{"id":207731,"date":"2023-05-18T19:52:48","date_gmt":"2023-05-18T19:52:48","guid":{"rendered":"https:\/\/blog.hannaservice.eu\/odaberite-pravu-elektrodu-za-svoje-uzorke\/"},"modified":"2023-05-24T07:34:47","modified_gmt":"2023-05-24T07:34:47","slug":"odaberite-pravu-elektrodu-za-svoje-uzorke","status":"publish","type":"post","link":"https:\/\/blog.hannaservice.eu\/hr\/odaberite-pravu-elektrodu-za-svoje-uzorke\/","title":{"rendered":"Odaberite pravu elektrodu za svoje uzorke"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"207731\" class=\"elementor elementor-207731 elementor-207008\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-74ff81c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"74ff81c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-de0a8d6\" data-id=\"de0a8d6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c3fc1ba elementor-widget elementor-widget-html\" data-id=\"c3fc1ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>.entry-content p {\n    margin-bottom: 0.8em;\n    line-height: initial;\n}\n#custom-img-header {\n    background-position-y: bottom;\n}\n<\/style>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-71287df elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"71287df\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6872492\" data-id=\"6872492\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-858b7ea elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"858b7ea\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-ce5e787\" data-id=\"ce5e787\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b2620ea elementor-widget elementor-widget-text-editor\" data-id=\"b2620ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3><strong>UZORCI MOGU BITI TE\u0160KI, ALI MJERENJE MO\u017dE BITI LAKO.<\/strong><\/h3>\n<p><b>pH vrijednost<\/b> je klju\u010dni parametar za mnoge primjene.<\/p>\n<p>To je temeljni parametar u <b>prehrambenoj industriji<\/b>, za optimizaciju niklanja ili bakrenja, za osiguranje optimalnih uvjeta za zdrav rast biljaka i jo\u0161 mnogo toga.<\/p>\n<p>Razlog tome je \u0161to pH vrijednost utje\u010de na mnoge biolo\u0161ke i kemijske procese kao \u0161to su <b>proliferacija\/pre\u017eivljavanje<\/b> <b>mikroorganizama<\/b>, aktivnost <b>enzima<\/b>, kemijske <b>reakcije<\/b> i ravnote\u017ee, topljivost <b>soli<\/b> itd.&nbsp;<\/p>\n<p>Naj\u010de\u0161\u0107e (i najpreciznije) pH vrijednost se mjeri pH metrom sa <b>staklenom elektrodom<\/b>. Me\u0111utim, dobivanje ispravnih i stabilnih vrijednosti mo\u017ee biti <b>te\u0161ko<\/b>, osobito u <b>nekim uzorcima<\/b> (kao \u0161to su hrana, zemlja, kreme, boje, uzorci s visokim pH, itd.).<\/p>\n<p>Va\u017eno je razumjeti <b>\u0161to zna\u010di pH<\/b>, kako radi <b>pH elektroda<\/b> i kako mjerenje mo\u017ee biti lak\u0161e kori\u0161tenjem <b>prave elektrode<\/b>.&nbsp;<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-39a9337 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"39a9337\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-791a021\" data-id=\"791a021\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9449746 elementor-widget elementor-widget-heading\" data-id=\"9449746\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Hanna Instruments je vode\u0107i proizvo\u0111a\u010d pH elektroda i nudi veliki izbor elektroda dizajniranih za specifi\u010dne primjene.<\/h3>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e5741e7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e5741e7\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e39eab6\" data-id=\"e39eab6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1cde4e3 elementor-cta--layout-image-left elementor-cta--mobile-layout-image-above elementor-cta--valign-middle elementor-cta--skin-classic elementor-animated-content elementor-widget elementor-widget-call-to-action\" data-id=\"1cde4e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-cta\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2022\/11\/Elektrode-Slika-1.jpg);\" role=\"img\" aria-label=\"\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tPetrokemijska industrija\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\t<p>Hanna fotometrijske elektrode za kori\u0161tenje s na\u0161im<br \/>\nautomatskim potenciometrijskim titratorima<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item \">\n\t\t\t\t\t<a class=\"elementor-cta__button elementor-button elementor-size-xl\" href=\"https:\/\/blog.hannaservice.eu\/hr\/petrokemijska-industrija-odredivanje-tan-i-tbn-fotometrijskim-sondama\/\">\n\t\t\t\t\t\tSAZNAJTE VI\u0160E\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6ecd8ae elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6ecd8ae\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-973941e\" data-id=\"973941e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-7fff750 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7fff750\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-86f2bad\" data-id=\"86f2bad\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44bd017 elementor-widget elementor-widget-heading\" data-id=\"44bd017\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">1. \u0160to je pH?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-81e2968\" data-id=\"81e2968\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1cb366d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1cb366d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e2e4042\" data-id=\"e2e4042\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4c8e09b elementor-widget elementor-widget-text-editor\" data-id=\"4c8e09b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>pH vrijednost je mjera koliko je aktivnih iona vodika prisutno u uzorku. U praksi se \u010de\u0161\u0107e umjesto aktivnosti koristi koncetracija. <\/p>\n<p>Jednostavnije re\u010deno, <strong>pH je mjera koliko je vodena otopina kisela ili lu\u017enata<\/strong>.<\/p>\n<p>Izraz &#8220;pH&#8221; ozna\u010dava &#8220;pondus hydrogenii&#8221; ili &#8220;potencijal vodika&#8221;, a prvi ga je uveo danski biokemi\u010dar Soren Peter Lauritz Sorensen 1909. godine. <br \/>Tijekom svog istra\u017eivanja \u010desto je trebao mjeriti koliko je kiselost uzorka i smatrao je prikladnijim napisati koncentraciju vodikovih iona u dekadnoj logaritamskoj ljestvici (na primjer 0,0000001 mol\/L H<sup>+<\/sup> postaje pH 7). pH je tada definiran kao [1]:<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-dfcc45b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dfcc45b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-e5dbf01\" data-id=\"e5dbf01\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c9d6625 elementor-widget elementor-widget-image\" data-id=\"c9d6625\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"369\" height=\"55\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-pH-1.png\" class=\"attachment-large size-large wp-image-207156\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-pH-1.png 369w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-pH-1-300x45.png 300w\" sizes=\"(max-width: 369px) 100vw, 369px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-c06223f\" data-id=\"c06223f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-de80513 elementor-widget elementor-widget-text-editor\" data-id=\"de80513\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>a = aktivnost<\/p>\n<p>c = koncentracija <\/p>\n<p>H<sup>+<\/sup> = vodikov ion<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c68ba3 elementor-widget elementor-widget-text-editor\" data-id=\"9c68ba3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>pH vrijednost se tako mjeri na logaritamskoj ljestvici od 0 do 14, pri \u010demu je 7 neutralno (Slika 1).<\/p>\n<p>Kada se u vodu doda tvar koja se zove kiselina, ona pove\u0107ava koncentraciju vodikovih iona i pH vrijednosti pada ispod 7. Nasuprot tome, tvar koja se zove baza smanjuje koncentraciju vodikovih iona i pH vrijednost raste iznad 7. To zna\u010di da je svaka otopina ispod pH 7 kisela, a svaka otopina iznad 7 je lu\u017enata. Budu\u0107i da koristimo dekadni logaritam, 1 pH manje zna\u010di 10 puta pove\u0107anje aktivnosti H<sup>+<\/sup>. [2]<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d798223 elementor-widget elementor-widget-image\" data-id=\"d798223\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"600\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/what-is-ph-scale.png\" class=\"attachment-full size-full wp-image-207318\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/what-is-ph-scale.png 1200w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/what-is-ph-scale-300x150.png 300w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/what-is-ph-scale-600x300.png 600w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/what-is-ph-scale-768x384.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 1: pH skala<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-18f9733 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"18f9733\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-04c18ab\" data-id=\"04c18ab\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-149b2a1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"149b2a1\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-abd6037\" data-id=\"abd6037\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8311fa7 elementor-widget elementor-widget-heading\" data-id=\"8311fa7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">2. Kako radi pH elektroda?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-0a9f264\" data-id=\"0a9f264\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-268efa9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"268efa9\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;shape_divider_bottom&quot;:&quot;mountains&quot;}\">\n\t\t\t\t\t<div class=\"elementor-shape elementor-shape-bottom\" aria-hidden=\"true\" data-negative=\"false\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1000 100\" preserveAspectRatio=\"none\">\n\t<path class=\"elementor-shape-fill\" opacity=\"0.33\" d=\"M473,67.3c-203.9,88.3-263.1-34-320.3,0C66,119.1,0,59.7,0,59.7V0h1000v59.7 c0,0-62.1,26.1-94.9,29.3c-32.8,3.3-62.8-12.3-75.8-22.1C806,49.6,745.3,8.7,694.9,4.7S492.4,59,473,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" opacity=\"0.66\" d=\"M734,67.3c-45.5,0-77.2-23.2-129.1-39.1c-28.6-8.7-150.3-10.1-254,39.1 s-91.7-34.4-149.2,0C115.7,118.3,0,39.8,0,39.8V0h1000v36.5c0,0-28.2-18.5-92.1-18.5C810.2,18.1,775.7,67.3,734,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" d=\"M766.1,28.9c-200-57.5-266,65.5-395.1,19.5C242,1.8,242,5.4,184.8,20.6C128,35.8,132.3,44.9,89.9,52.5C28.6,63.7,0,0,0,0 h1000c0,0-9.9,40.9-83.6,48.1S829.6,47,766.1,28.9z\"\/>\n<\/svg>\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8ee3319\" data-id=\"8ee3319\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-68cfbf8 elementor-widget elementor-widget-text-editor\" data-id=\"68cfbf8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Staklena elektroda ili pH elektroda vrsta je ion-selektivne elektrode &#8211; selektivna je za mjerenje vodikovih iona. Za potenciometrijsko mjerenje pH potrebni su sljede\u0107i dijelovi:<\/p>\n<ul>\n<li><strong>referentna elektroda<\/strong>, naj\u010de\u0161\u0107a je srebrno-kloridna polu\u0107elija (srebrna \u017eica presvu\u010dena AgCl u kontaktu sa zasi\u0107enom otopinom KCl) \u2013 ima konstantan potencijal<\/li>\n<li><strong>indikatorska elektroda s pH osjetljivim staklom<\/strong> \u2013 mijenja potencijal kao odgovor na koncentraciju analita, <\/li>\n<li><strong>mV metar<\/strong> \u2013 o\u010ditava razliku potencijala izme\u0111u referentne i indikatorske elektrode.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-88ae091 elementor-widget elementor-widget-image\" data-id=\"88ae091\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"526\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode-600x526.png\" class=\"attachment-large size-large wp-image-207149\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode-600x526.png 600w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode-300x263.png 300w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode-768x673.png 768w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode-1536x1346.png 1536w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/A-combination-pH-electrode.png 1780w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"> Slika 2: Kombinirana pH elektroda<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66581d4 elementor-widget elementor-widget-text-editor\" data-id=\"66581d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Obi\u010dno se koristi kombinirana pH elektroda (Slika 2), koja uklju\u010duje i referentnu i indikatorsku elektrodu.<\/p>\n<p>Dio elektrode koji je osjetljiv na pH je tanka staklena kuglica ili sto\u017eac na dnu indikatorske elektrode. Na povr\u0161ini ovog osjetljivog stakla nalaze se negativno nabijeni atomi kisika (iz SiO<sub>4<\/sub>) koji mogu vezati pozitivno nabijene ione odgovaraju\u0107e veli\u010dine &#8211; vodikove ione (a tako\u0111er i alkalijske ione, ali manje snage). <\/p>\n<p>Koliko je iona vodika vezano na povr\u0161inu osjetljivog stakla ovisi o aktivnosti (koncentraciji) iona vodika u uzorku. Kada se vodikovi ioni ve\u017eu za pH osjetljivo staklo, stvara se elektri\u010dni potencijal. Stoga, o\u010ditavanjem ovog potencijala mV metrom, pH vrijednost se mo\u017ee izra\u010dunati pomo\u0107u Nernstove jednad\u017ebe [2]:<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-f1d627c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f1d627c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-ed8bc8d\" data-id=\"ed8bc8d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-65c660f elementor-widget elementor-widget-image\" data-id=\"65c660f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"357\" height=\"47\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-E-1.png\" class=\"attachment-large size-large wp-image-207170\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-E-1.png 357w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/formula-E-1-300x39.png 300w\" sizes=\"(max-width: 357px) 100vw, 357px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-0955050\" data-id=\"0955050\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c82ab43 elementor-widget elementor-widget-text-editor\" data-id=\"c82ab43\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>E = potencijal u mV<\/p>\n<p>E<sup>0<\/sup> = elektri\u010dni potencijal koji proizvodi referentna elektroda<\/p>\n<p>\u03b2 = u\u010dinak dehidracije, one\u010di\u0161\u0107enja, ogrebotina itd. na staklenu membranu<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-9261649 elementor-widget elementor-widget-text-editor\" data-id=\"9261649\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Druga klju\u010dna komponenta elektrode je <strong>spoj<\/strong>, koji omogu\u0107uje kontakt izme\u0111u otopine u referentnoj elektrodi (elektrolit, zasi\u0107eni KCl) i uzorka. Elektrolit istje\u010de iz referentne elektrode u uzorak, zatvaraju\u0107i elektri\u010dni krug i omogu\u0107uju\u0107i mjerenja. \u0160to je ve\u0107i protok elektrolita, bolji je odziv elektrode. [2] <\/p>\n<p>Standardne <strong>jednospojne elektrode<\/strong> imaju referentnu elektrodu u izravnom kontaktu s uzorkom (Slika 3). Srebrni klorid prisutan u referentnoj elektrodi mo\u017ee imati nisku topljivost u uzorku, pa se pri kontaktu s uzorkom stvara talog na vanjskoj strani spoja \u0161to rezultira nepravilnim o\u010ditavanjem. Pod nepovoljnim uvjetima (visoki tlak, visoka temperatura, visoka vodljivost) tok elektrolita tako\u0111er se mo\u017ee preokrenuti, \u0161to rezultira kontaminacijom referentne polu\u0107elije i potpunim kvarom elektrode.<\/p>\n<p><strong>Elektrode s dvostrukim spojem<\/strong> imaju, kao \u0161to naziv govori, dva spoja (slika 3). Ove elektrode imaju dodatni odjeljak za referentnu elektrodu s unutarnjim spojem. Me\u0111upodru\u010dje je bez srebra i nije osjetljivo na kontaminaciju, pove\u0107avaju\u0107i dugovje\u010dnost elektrode.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e003501 elementor-widget elementor-widget-image\" data-id=\"e003501\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"475\" height=\"318\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/Double-and-single-junction-electrode.png\" class=\"attachment-full size-full wp-image-207197\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/Double-and-single-junction-electrode.png 475w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/Double-and-single-junction-electrode-300x201.png 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 3: Usporedba elektrode s dvostrukim spojem i elektrode s jednim spojem<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f445f88 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f445f88\" data-element_type=\"section\" data-e-type=\"section\" id=\"bluebox\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d95933b\" data-id=\"d95933b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b608f1f elementor-widget elementor-widget-heading\" data-id=\"b608f1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Za\u0161to pH elektrode moraju biti kalibrirane?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ed6a28 elementor-widget elementor-widget-text-editor\" data-id=\"2ed6a28\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Vrijednosti E<sup>0<\/sup> i \u03b2 u Nernstovoj jednad\u017ebi ovise o stanju staklene membrane (razina hidratacije, naslage, ogrebotine itd.) i spoju (razina za\u010depljenja).<\/p>\n<p>Izra\u010dunavanje ovih vrijednosti bilo bi nemogu\u0107e u praksi, a promjene su previ\u0161e zna\u010dajne za rezultate. Nakon kalibracije pH elektrode s otopinama poznate vrijednosti (po mogu\u0107nosti s najmanje dvije), mjerenja se prilago\u0111avaju u skladu s tim.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-68f8e98 elementor-widget elementor-widget-html\" data-id=\"68f8e98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>#bluebox a {color:#ffff00 !important;}\n        #bluebox a:hover {color:#FF6900 !important;}\n<\/style>\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-6433486 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6433486\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-3a2ce9e\" data-id=\"3a2ce9e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1ca742e elementor-widget elementor-widget-heading\" data-id=\"1ca742e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Za\u0161to pH elektrode treba odr\u017eavati?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-362a8ef elementor-widget elementor-widget-text-editor\" data-id=\"362a8ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Va\u017eno je razumjeti da se vodikovi ioni mogu vezati na staklenu membranu samo ako je hidratizirana, zbog toga elektrodu treba pohraniti u <a href=\"https:\/\/www.hannaservice.eu\/storage-solution-for-ph-and-orp-electrodes-25-x-20-ml-hi70300p-product\" target=\"_blank\"><strong>HI70300 otopinu za \u010duvanje<\/strong><\/a> koja odr\u017eava povr\u0161inu elektrode hidratiziranom i spremnom za mjerenje (Slika 4).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-fb91c4a\" data-id=\"fb91c4a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e31865a elementor-widget elementor-widget-image\" data-id=\"e31865a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"359\" height=\"431\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi70300.png\" class=\"attachment-full size-full wp-image-207326\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi70300.png 359w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi70300-250x300.png 250w\" sizes=\"(max-width: 359px) 100vw, 359px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 4: \u010cuvanje elektrode u otopini za skladi\u0161tenje HI70300<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-76574ed elementor-widget elementor-widget-text-editor\" data-id=\"76574ed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Ioni vodika tako\u0111er se ne mogu vezati za povr\u0161inu, ako postoje (organske ili anorganske) naslage. Koli\u010dina povr\u0161ine koja je dostupna za mjerenje utje\u010de na kvalitetu mjerenja. <\/p>\n<p>\u010ci\u0161\u0107enje s <a href=\"https:\/\/www.hannaservice.eu\/general-purpose-ph-electrode-cleaning-solution-500-ml-hi7061l-product\" target=\"_blank\" rel=\"noopener\"><strong>HI7061 otopinom op\u0107e namjene ili otopinom za \u010di\u0161\u0107enje za specifi\u010dnu primjenu<\/strong><\/a> uklonit \u0107e naslage i obnoviti elektrodu (Slika 5).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-97d0c34 elementor-widget elementor-widget-image\" data-id=\"97d0c34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1618\" height=\"605\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning.png\" class=\"attachment-full size-full wp-image-207333\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning.png 1618w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning-300x112.png 300w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning-600x224.png 600w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning-768x287.png 768w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-hi7061-cleaning-1536x574.png 1536w\" sizes=\"(max-width: 1618px) 100vw, 1618px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 5: Uklanjanje naslaga s povr\u0161ine pH osjetljivog stakla s HI7061 otopinom za \u010di\u0161\u0107enje op\u0107e namjene<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-e814e62 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e814e62\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-8ce1bc4\" data-id=\"8ce1bc4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d9d8886 elementor-widget elementor-widget-image\" data-id=\"d9d8886\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"614\" height=\"646\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-levels.png\" class=\"attachment-full size-full wp-image-207340\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-levels.png 614w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-levels-285x300.png 285w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-levels-570x600.png 570w\" sizes=\"(max-width: 614px) 100vw, 614px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 6: Idealna razina elektrolita.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-358df03\" data-id=\"358df03\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6570b53 elementor-widget elementor-widget-text-editor\" data-id=\"6570b53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Razinu elektrolita u referentnoj elektrodi treba odr\u017eavati na 1-2 cm ispod otvora za punjenje radi odr\u017eavanja odgovaraju\u0107eg tlaka za istjecanje elektrolita (Slika 6).<\/p>\n<p>Prije mjerenja, razine elektrolita treba provjeriti i po potrebi ponovno napuniti <a href=\"https:\/\/www.hannaservice.eu\/3-5m-kcl-fill-solution-for-double-junction-electrodes-4-x-30ml-hi7082-product\" target=\"_blank\" rel=\"noopener\"><strong>elektrolitom HI7082 za elektrode s dvostrukim spojem<\/strong><\/a> ili <a href=\"https:\/\/www.hannaservice.eu\/electrolyte-fill-solution-1m-kno-30-ml-x-4-hi7072-product\" target=\"_blank\" rel=\"noopener\"><strong>elektrolitom HI7072 za elektrode s jednim spojem<\/strong><\/a>. A tijekom mjerenja va\u017eno je da \u010dep bude labav ili otvoren.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-e977bb1 elementor-widget elementor-widget-heading\" data-id=\"e977bb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Kako provjeriti stanje pH elektrode?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ff4594 elementor-widget elementor-widget-text-editor\" data-id=\"8ff4594\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Za provjeru elektrode, ako je u dobrom stanju, <strong>potrebno je odrediti pomak i nagib<\/strong>.<\/p>\n<p><strong>Pomak<\/strong> je vrijednost mV izmjerena u otopini s <strong>pH 7,0<\/strong>. Teoretski, ova bi vrijednost trebala biti 0 mV, ali u praksi je prihvatljiv pomak od <strong>\u00b1<\/strong><strong>30 mV<\/strong>.<\/p>\n<p><strong>Nagib<\/strong> se mo\u017ee odrediti mjerenjem vrijednosti mV u otopinama s pH 7,0 i pH 4,0 (ili pH 10,0) i izra\u010dunavanjem apsolutne razlike mV.<\/p>\n<p>Iz <strong>Nernstove jednad\u017ebe<\/strong> mo\u017eemo vidjeti da bi ta razlika trebala biti 59,16 mV * 3 (razlika u pH) = 177,48 mV, ali od <strong>150 mV do 186 mV je prihvatljiv nagib<\/strong>.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-535e44f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"535e44f\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;shape_divider_top&quot;:&quot;mountains&quot;}\">\n\t\t\t\t\t<div class=\"elementor-shape elementor-shape-top\" aria-hidden=\"true\" data-negative=\"false\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1000 100\" preserveAspectRatio=\"none\">\n\t<path class=\"elementor-shape-fill\" opacity=\"0.33\" d=\"M473,67.3c-203.9,88.3-263.1-34-320.3,0C66,119.1,0,59.7,0,59.7V0h1000v59.7 c0,0-62.1,26.1-94.9,29.3c-32.8,3.3-62.8-12.3-75.8-22.1C806,49.6,745.3,8.7,694.9,4.7S492.4,59,473,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" opacity=\"0.66\" d=\"M734,67.3c-45.5,0-77.2-23.2-129.1-39.1c-28.6-8.7-150.3-10.1-254,39.1 s-91.7-34.4-149.2,0C115.7,118.3,0,39.8,0,39.8V0h1000v36.5c0,0-28.2-18.5-92.1-18.5C810.2,18.1,775.7,67.3,734,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" d=\"M766.1,28.9c-200-57.5-266,65.5-395.1,19.5C242,1.8,242,5.4,184.8,20.6C128,35.8,132.3,44.9,89.9,52.5C28.6,63.7,0,0,0,0 h1000c0,0-9.9,40.9-83.6,48.1S829.6,47,766.1,28.9z\"\/>\n<\/svg>\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a365d26\" data-id=\"a365d26\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1a15da7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1a15da7\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c732100\" data-id=\"c732100\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-e59e4a7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e59e4a7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-d717c1e\" data-id=\"d717c1e\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-13f6744 elementor-widget elementor-widget-heading\" data-id=\"13f6744\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-large\">3. Mjerenje pH te\u0161kih uzoraka<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-f335c26\" data-id=\"f335c26\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8f12dc5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8f12dc5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5fc49af\" data-id=\"5fc49af\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9b98529 elementor-widget elementor-widget-text-editor\" data-id=\"9b98529\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Kod mjerenja pH staklenom elektrodom mo\u017eemo se suo\u010diti s odre\u0111enim pote\u0161ko\u0107ama. Prvo moramo biti sigurni da je elektroda pravilno odr\u017eavana (o\u010di\u0161\u0107ena, hidratizirana, ponovno napunjena) i kalibrirana svje\u017eim puferima. Ako problemi potraju, <strong>dizajn elektrode nije prikladan za mjerenje pH u na\u0161em uzorku<\/strong>. Neki od naj\u010de\u0161\u0107ih problema su:<\/p>\n<ul>\n<li>kada nema dovoljnog protoka elektrolita zbog kemijskih\/fizikalnih svojstava uzorka ili za\u010depljenja spoja,<\/li>\n<li>kada je uzorak polutvrd ili \u010dvrst,<\/li>\n<li>kada postoji zna\u010dajna koncentracija natrija ili drugih alkalnih iona,<\/li>\n<li>ako imamo posla s uzorkom s HF,<\/li>\n<li>ako mjerimo uzorkiva\u010de s visokim\/niskim temperaturama ili<\/li>\n<li>kada postoji buka iz okoline.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1857ac elementor-widget elementor-widget-heading\" data-id=\"f1857ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Hanna Instruments nudi rje\u0161enja za sve te probleme s posebnim spojevima, vrhovima, vrstom stakla i dizajnom tijela.<\/h3>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-133f2e6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"133f2e6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f009c29\" data-id=\"f009c29\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-c16d5e7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c16d5e7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-4f574d3\" data-id=\"4f574d3\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a270905 elementor-widget elementor-widget-heading\" data-id=\"a270905\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.1. Nizak protok elektrolita<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-499bf3c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"499bf3c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6ae5b9b\" data-id=\"6ae5b9b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-72f1bc2 elementor-widget elementor-widget-text-editor\" data-id=\"72f1bc2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li>uzorci <strong>niske vodljivosti<\/strong> (npr. voda za pi\u0107e, uzorci s manje od 100 \u03bcS\/cm)<\/li>\n<li>uzorci <strong>visoke vodljivosti<\/strong> (npr. slane vode, morska voda, jake kiseline, jake baze)<\/li>\n<li><strong>viskozni<\/strong> uzorci (npr. boja, kozmetika, paste, emulzije)<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-510316e elementor-widget elementor-widget-text-editor\" data-id=\"510316e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Za dobivanje stabilnih o\u010ditanja klju\u010dno je imati dovoljan protok elektrolita od referentne elektrode u uzorak kroz spoj.<\/p>\n<p>U slu\u010dajevima kada se referentni elektrolit i uzorak jako razlikuju po sastavu, taj protok je ograni\u010den i fenomen koji se naziva <em>spojni potencijal<\/em> ima zna\u010dajan u\u010dinak na mjerenja.<\/p>\n<p>Standardne elektrode imaju jedan kerami\u010dki spoj koji ne osigurava dovoljan protok elektrolita kada se mjeri pH uzoraka niske vodljivosti, uzoraka visoke vodljivosti ili viskoznih uzoraka. Kori\u0161tenjem elektroda s vi\u0161estrukim kerami\u010dkim spojevima pove\u0107ava se protok i stabiliziraju o\u010ditanja.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-68b7151 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"68b7151\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-d5e68ed\" data-id=\"d5e68ed\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cf7f136 elementor-widget elementor-widget-text-editor\" data-id=\"cf7f136\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.hannaservice.eu\/digital-ph-electrode-for-semi-solids-and-emulsions-hi10530-product\" target=\"_blank\" rel=\"noopener\" data-wplink-edit=\"true\"><strong>Hanna Instruments HI10530 pH elektroda s dvostrukim spojem s trostrukim kerami\u010dkim spojem na vanjskom spoju<\/strong><\/a> (Slika 7) dizajnirana je za pouzdana pH mjerenja u uzorcima niske vodljivosti i viskoznosti, s protokom elektrolita od 40 do 50 \u00b5L\/sat (u usporedbi s 15 do 20 \u00b5L\/sat za standardnu \u200b\u200belektrodu).<\/p>\n<p>Nadalje, niskotemperaturna vrsta stakla s ni\u017eom impedancijom pobolj\u0161ava kvalitetu pH mjerenja u takvim uzorcima.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-bd0715b\" data-id=\"bd0715b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8701bbe elementor-widget elementor-widget-image\" data-id=\"8701bbe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/digital-ph-electrode-for-semi-solids-and-emulsions-hi10530-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"263\" height=\"340\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1053.png\" class=\"attachment-full size-full wp-image-207350\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1053.png 263w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1053-232x300.png 232w\" sizes=\"(max-width: 263px) 100vw, 263px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 7: Elektroda Hanna Instruments HI1053<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ef9c92a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ef9c92a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-e848055\" data-id=\"e848055\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-24418e4 elementor-widget elementor-widget-text-editor\" data-id=\"24418e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.hannaservice.eu\/ph-electrode-for-hydrocarbons-and-solvents-digital-ph-electrode-hi10430-product\" target=\"_blank\" rel=\"noopener\" data-wplink-edit=\"true\"><strong>Hanna Instruments HI10430 pH elektroda s dvostrukim spojem s dvostrukim kerami\u010dkim spojem<\/strong><\/a> (Slika 8) idealna je za primjene koje uklju\u010duju uzorke visoke vodljivosti ili koncentrirane uzorke, s brzinom protoka elektrolita od 30 do 40 \u00b5L\/sat.<\/p>\n<p>Sustav dvostrukog spoja tako\u0111er \u0161titi referentnu elektrodu od kontaminacije.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-f9fc926\" data-id=\"f9fc926\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-92ba769 elementor-widget elementor-widget-image\" data-id=\"92ba769\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/ph-electrode-for-hydrocarbons-and-solvents-digital-ph-electrode-hi10430-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"311\" height=\"369\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1043.png\" class=\"attachment-full size-full wp-image-207357\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1043.png 311w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1043-253x300.png 253w\" sizes=\"(max-width: 311px) 100vw, 311px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 8: Elektroda Hanna Instruments HI1043<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-75d2546 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"75d2546\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c9e275e\" data-id=\"c9e275e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-400379f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"400379f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-07ca491\" data-id=\"07ca491\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a1775dc elementor-widget elementor-widget-heading\" data-id=\"a1775dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.2. Za\u010depljen spoj<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5461046 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5461046\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7bad49d\" data-id=\"7bad49d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-65b00e9 elementor-widget elementor-widget-text-editor\" data-id=\"65b00e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li><strong>&#8220;prljavi&#8221; uzorci<\/strong> s visokim udjelom krutih tvari (npr. vino, sok, ka\u0161a, sladovina)<\/li>\n<li><strong>mast<\/strong><\/li>\n<li><strong>sadr\u017eaj proteina<\/strong> (npr. mlijeko, meso, sir i drugi uzorci hrane)<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e6a472 elementor-widget elementor-widget-text-editor\" data-id=\"8e6a472\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Kao \u0161to je prethodno obja\u0161njeno, curenje elektrolita iz referentne elektrode u uzorke zatvara elektri\u010dni krug i omogu\u0107uje mjerenja. Svako za\u010depljenje spoja rezultirat \u0107e nepravilnim i nestabilnim o\u010ditanjima.<\/p>\n<p>&#8220;Prljavi&#8221; uzorci koji imaju visok sadr\u017eaj \u010dvrstih tvari, masti, proteina itd. mogu brzo za\u010depiti konvencionalne kerami\u010dke spojeve i u\u010diniti elektrodu neupotrebljivom.<\/p>\n<p>Odabir elektrode s posebnim dizajnom spoja koji je otporan na za\u010depljenje (npr. sustav za sprje\u010davanje za\u010depljenja, platneni spoj ili otvoreni spoj) produljuje dugovje\u010dnost elektrode.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-2527f19 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2527f19\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-22f21b1\" data-id=\"22f21b1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6a5284d elementor-widget elementor-widget-text-editor\" data-id=\"6a5284d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.hannaservice.eu\/digital-glass-body-ph-electrode-with-clogging-prevention-system-cpstm-hi10480-product\" target=\"_blank\" rel=\"noopener\"><strong>Hanna Instruments HI1048 pH elektroda ima tehnologiju Sustava protiv za\u010depljenja (CPS)<\/strong><\/a> (Slika 9) dizajniranu za pH analizu vina, mo\u0161ta i soka.<\/p>\n<p>CPS tehnologija koristi poroznost bru\u0161enog stakla u kombinaciji s PTFE \u010dahurom kako bi se sprije\u010dilo za\u010depljenje spoja.<\/p>\n<p>Bru\u0161eno staklo omogu\u0107uje pravilan protok teku\u0107ine, dok PTFE navlaka odbija krutine.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-484d5e0\" data-id=\"484d5e0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dfb799f elementor-widget elementor-widget-image\" data-id=\"dfb799f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/digital-glass-body-ph-electrode-with-clogging-prevention-system-cpstm-hi10480-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"136\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-HI1048.jpg\" class=\"attachment-full size-full wp-image-207364\" alt=\"\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 9: Elektroda Hanna Instruments HI1048<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-cbc584b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cbc584b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-bb072f5\" data-id=\"bb072f5\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3d1dac9 elementor-widget elementor-widget-image\" data-id=\"3d1dac9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/wireless-beer-ph-meter-halor-fc2142-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"147\" height=\"157\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/electrode-FC214-e1684431744846.jpg\" class=\"attachment-full size-full wp-image-207371\" alt=\"\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 10: Hanna Instruments FC214 elektroda<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-503643a\" data-id=\"503643a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-60ef001 elementor-widget elementor-widget-text-editor\" data-id=\"60ef001\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Jo\u0161 jedan dizajn spoja prikladan za mjerenje pH uzoraka s visokim sadr\u017eajem tla je <strong>spoj s tkaninom koji se mo\u017ee uvla\u010diti<\/strong>.<\/p>\n<p>U tom slu\u010daju spoj se mo\u017ee o\u010distiti jednostavnim izvla\u010denjem otprilike 3 mm spoja.<\/p>\n<p><a href=\"https:\/\/www.hannaservice.eu\/wireless-beer-ph-meter-halor-fc2142-product\" target=\"_blank\" rel=\"noopener\"><strong>Hanna Instruments FC214 pH elektroda<\/strong><\/a> (Slika 10) ima platneni spoj i idealna je za analizu ka\u0161e i sladovine u procesu proizvodnje piva.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-e101f52 elementor-widget elementor-widget-text-editor\" data-id=\"e101f52\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>pH elektrode serije Hanna Instruments Foodcare imaju dizajn otvorenog spoja.<\/strong><\/p>\n<p>U ovoj vrsti spoja, gdje je su\u010delje \u010dvrstog gela (viskolen) izme\u0111u uzorka i unutarnje reference Ag\/AgCl.<\/p>\n<p>Ovo su\u010delje \u010dini ga nepropusnim za za\u010depljenje, \u0161to rezultira brzim odgovorom i stabilnim o\u010ditanjima.<\/p>\n<p>Osim toga, ovakav spoj sprje\u010dava kontaminaciju uzorka \u0161to je klju\u010dno kod testiranja hrane.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-871a76c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"871a76c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b18fbc6\" data-id=\"b18fbc6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d2742dc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d2742dc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-b3af1da\" data-id=\"b3af1da\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0db408d elementor-widget elementor-widget-heading\" data-id=\"0db408d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.3. \u010cvrsti i polu\u010dvrsti uzorci<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e8d36bc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e8d36bc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4fc5834\" data-id=\"4fc5834\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-19b6357 elementor-widget elementor-widget-text-editor\" data-id=\"19b6357\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li><strong>polu\u010dvrsti<\/strong> uzorci (npr. jogurt, sir, meso, vrhnje, uzorci tla)<\/li>\n<li><strong>\u010dvrsti<\/strong> uzorci (npr. ko\u017ea, ko\u017ea, agar plo\u010de, papir)<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb15a95 elementor-widget elementor-widget-text-editor\" data-id=\"fb15a95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Konvencionalne sferi\u010dne pH elektrode dizajnirane su za vodene uzorke budu\u0107i da pru\u017eaju veliku povr\u0161inu za interakciju uzoraka.<\/p>\n<p>S ovom vrstom oblika vrha, me\u0111utim, te\u0161ko je prodrijeti u polu\u010dvrste uzorke ili do\u0107i u kontakt s krutim uzorcima. Elektrode s vrhovima konusnog ili ravnog oblika omogu\u0107uju izravno mjerenje.<\/p>\n<p>Ispitivanje polu\u010dvrstih uzoraka olak\u0161ano je elektrodama s konusnim vrhom. Ova vrsta dizajna vrha omogu\u0107uje prodor i izravno mjerenje pH u uzorcima poput jogurta, sira, mesa, vrhnja, tla itd.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3ff91e elementor-widget elementor-widget-heading\" data-id=\"d3ff91e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Hanna Instruments nudi veliki izbor elektroda konusnog oblika dizajniranih za specifi\u010dne uzorke (Slika 11).<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-2cdfa02 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2cdfa02\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-20 elementor-inner-column elementor-element elementor-element-fe47b49\" data-id=\"fe47b49\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e7d2b07 elementor-widget elementor-widget-image\" data-id=\"e7d2b07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/elementor\/thumbs\/hanna-electrodes-food-q6nngethxezbdqbrtsa6icummqpy6i3o7kxn647594.png\" title=\"hanna-electrodes-food\" alt=\"hanna-electrodes-food\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Hrana op\u0107enito<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-20 elementor-inner-column elementor-element elementor-element-9e77d8e\" data-id=\"9e77d8e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-917c63a elementor-widget elementor-widget-image\" data-id=\"917c63a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"260\" height=\"344\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-yoghurt.png\" class=\"attachment-full size-full wp-image-207392\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-yoghurt.png 260w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-yoghurt-227x300.png 227w\" sizes=\"(max-width: 260px) 100vw, 260px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Jogurt <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-20 elementor-inner-column elementor-element elementor-element-a006ae5\" data-id=\"a006ae5\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-36f5949 elementor-widget elementor-widget-image\" data-id=\"36f5949\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/elementor\/thumbs\/hanna-electrodes-soil-cream-q6nnms64qj7mj5eenoamuc6fu5mhazvzqfr1x0bzz6.png\" title=\"hanna-electrodes-soil-cream\" alt=\"hanna-electrodes-soil-cream\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Zemlja, kreme<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-20 elementor-inner-column elementor-element elementor-element-7bb4346\" data-id=\"7bb4346\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5140974 elementor-widget elementor-widget-image\" data-id=\"5140974\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"238\" height=\"257\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-cheese.png\" class=\"attachment-full size-full wp-image-207406\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Sir<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-20 elementor-inner-column elementor-element elementor-element-74622cc\" data-id=\"74622cc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0473261 elementor-widget elementor-widget-image\" data-id=\"0473261\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"259\" height=\"386\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-meat.png\" class=\"attachment-large size-large wp-image-207413\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-meat.png 259w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hanna-electrodes-meat-201x300.png 201w\" sizes=\"(max-width: 259px) 100vw, 259px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Meso<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc7f65e elementor-widget elementor-widget-text-editor\" data-id=\"dc7f65e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Slika 11: Hanna Instruments elektrode<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-dd20707 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dd20707\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-9bc36f7\" data-id=\"9bc36f7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ca16bd1 elementor-widget elementor-widget-text-editor\" data-id=\"ca16bd1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>U slu\u010daju krutih uzoraka, kada prodiranje u uzorak nije mogu\u0107e, povr\u0161inski kontakt treba optimizirati kori\u0161tenjem ravnog oblika elektrode.<\/p>\n<p><a href=\"https:\/\/www.hannaservice.eu\/digital-flat-tip-ph-electrode-for-food-surfaces-hi14140-product\" target=\"_blank\" rel=\"noopener\"><strong>Hanna Instruments HI1414 elektroda s ravnim vrhom<\/strong><\/a> (Slika 12) dizajnirana je za povr\u0161inska mjerenja pH na ko\u017ei, ko\u017ei, agar plo\u010dama, papiru itd.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-8e5127b\" data-id=\"8e5127b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9e3a69b elementor-widget elementor-widget-image\" data-id=\"9e3a69b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/digital-flat-tip-ph-electrode-for-food-surfaces-hi14140-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"247\" height=\"331\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1414.png\" class=\"attachment-full size-full wp-image-207420\" alt=\"\" srcset=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1414.png 247w, https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1414-224x300.png 224w\" sizes=\"(max-width: 247px) 100vw, 247px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 12: Elektroda Hanna Instruments HI1414<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6965a4e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6965a4e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-594740a\" data-id=\"594740a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-3ada921 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3ada921\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-48be445\" data-id=\"48be445\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46e8f66 elementor-widget elementor-widget-heading\" data-id=\"46e8f66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.4. Uzorci s visokim pH<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-161d763 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"161d763\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9b572d8\" data-id=\"9b572d8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1ac2052 elementor-widget elementor-widget-text-editor\" data-id=\"1ac2052\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li>uzorci s <strong>pH vi\u0161im od 12<\/strong> (npr. deterd\u017eenti, sapunica, sredstva za \u010di\u0161\u0107enje ku\u0107anstva, jake baze)<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c20f0a8 elementor-widget elementor-widget-text-editor\" data-id=\"c20f0a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Staklo <strong>osjetljivo na pH<\/strong> nije striktno selektivno za vodikove ione.<\/p>\n<p><strong>Alkalijski ioni<\/strong>, posebice ioni natrija, tako\u0111er se mogu vezati na staklenu povr\u0161inu, ali s manjom snagom i u ve\u0107ini slu\u010dajeva nemaju zna\u010dajan utjecaj na pH mjerenja.<\/p>\n<p>U uzorcima s <strong>visokim pH<\/strong>, koncentracija <strong>vodikovih iona<\/strong> je vrlo mala u usporedbi s koncentracijom <strong>alkalnih iona<\/strong>, a koli\u010dina alkalnih iona na povr\u0161ini stakla \u010dini zna\u010dajne promjene u potencijalu o\u010ditanja.<\/p>\n<p><strong>Prikazana pH<\/strong> vrijednost je stoga <strong>ni\u017ea<\/strong> nego \u0161to zapravo jest. Razlika izme\u0111u teoretskih i izmjerenih vrijednosti naziva se <strong>alkalna pogre\u0161ka<\/strong>.<\/p>\n<p><strong>Visokotemperaturno staklo Hanna Instruments smanjuje alkalnu pogre\u0161ku<\/strong> u visoko alkalnim otopinama.<\/p>\n<p>Pri pH 13 u otopini s 1,0 M koncentracijom natrija alkalna pogre\u0161ka za visokotemperaturno staklo je 0,15 pH, u usporedbi s 0,43 pH za staklo op\u0107e namjene i preko 0,79 pH za niskotemperaturno staklo.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7888aa1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7888aa1\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d4f3ffd\" data-id=\"d4f3ffd\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-ec812c8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ec812c8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-33989a1\" data-id=\"33989a1\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-37efb5d elementor-widget elementor-widget-heading\" data-id=\"37efb5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.5. Uzorci s fluorovodi\u010dnom kiselinom<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8411261 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8411261\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9293f5e\" data-id=\"9293f5e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8c7f1f3 elementor-widget elementor-widget-text-editor\" data-id=\"8c7f1f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li><strong>laboratorijski reagensi<\/strong> i analiti\u010dki standardi koji sadr\u017ee <strong>fluoride<\/strong><\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f945c0 elementor-widget elementor-widget-text-editor\" data-id=\"1f945c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Fluorovodi\u010dna kiselina mo\u017ee brzo otopiti staklo. Elektroda <a href=\"https:\/\/www.hannaservice.eu\/flat-tip-ph-electrode-for-skin-and-surfaces-hi14143-product\" target=\"_blank\" rel=\"noopener\"><strong>Hanna Instruments HI1143 koristi staklo otporno na HF<\/strong><\/a> za agresivne primjene koje uklju\u010duju fluoridne ione (do 2 g\/L).<\/p>\n<p>Elektrode proizvedene od ovog stakla traju deset puta dulje od elektroda izra\u0111enih od standardnih formulacija pH stakla (od 10 do 100 dana). Osim toga, dvostruki dizajn spoja \u0161titi referentnu elektrodu od kontaminacije.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-354964a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"354964a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-065a08f\" data-id=\"065a08f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-a4076b2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a4076b2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-1077c36\" data-id=\"1077c36\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d8d5b8d elementor-widget elementor-widget-heading\" data-id=\"d8d5b8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.6. Uzorci visoke\/niske temperature<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-50f81bd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"50f81bd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9fc4cf5\" data-id=\"9fc4cf5\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9d39d4a elementor-widget elementor-widget-text-editor\" data-id=\"9d39d4a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li><strong>ohla\u0111ena hrana<\/strong><\/li>\n<li><strong>pasterizacija<\/strong><\/li>\n<li><strong>kuhana sladovina<\/strong><\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d0746f elementor-widget elementor-widget-text-editor\" data-id=\"7d0746f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Na niskim temperaturama elektrode sa staklom visoke impedancije \u0107e na niskim temperaturama davati vrlo \u0161umne i nestalne signale. <strong>Hanna Instruments elektrode sa staklom NISKE temperature<\/strong> imaju nisku impedanciju i omogu\u0107uju stabilna mjerenja na ni\u017eim temperaturama.<\/p>\n<p>Me\u0111utim, na povi\u0161enim temperaturama staklo se mo\u017ee lako otopiti, skra\u0107uju\u0107i \u017eivotni vijek i u\u010dinkovitost elektrode. <strong>Hanna Instruments elektrode sa<\/strong> <strong>staklom za VISOKU temperaturu<\/strong> dizajnirane su za produljenu upotrebu na povi\u0161enim temperaturama. Sa staklom ve\u0107eg otpora mjerenja na povi\u0161enim temperaturama su to\u010dna s izvrsnim vremenom odziva.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-357b04e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"357b04e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-92fb4d3\" data-id=\"92fb4d3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-f9ffd2b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f9ffd2b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-89eaffc\" data-id=\"89eaffc\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a78e83a elementor-widget elementor-widget-heading\" data-id=\"a78e83a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-medium\">3.7. Uzorci s elektri\u010dnim strujama<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-79d4a7a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"79d4a7a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d476f94\" data-id=\"d476f94\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a919c20 elementor-widget elementor-widget-text-editor\" data-id=\"a919c20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Primjeri: <\/strong><\/p>\n<ul>\n<li><strong>galvanske kupke <\/strong><\/li>\n<li><strong>rashladni tornjevi <\/strong><\/li>\n<li><strong>kotlovi <\/strong><\/li>\n<li><strong>bazeni<\/strong><\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6635823 elementor-widget elementor-widget-text-editor\" data-id=\"6635823\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Elektri\u010dne struje<\/strong> u uzorku <strong>mogu utjecati<\/strong> na referentni napon polu\u0107elije koji je preko teku\u0107eg spoja povezan s uzorkom. U tom slu\u010daju, referentna elektroda hvata elektromagnetska polja i <strong>mjerenje<\/strong> pH vrijednosti se <strong>mijenja<\/strong>.<\/p>\n<p><strong>Odgovaraju\u0107a igla<\/strong> je tehnika diferencijalnog mjerenja koja se koristi za <strong>eliminiranje petlji uzemljenja<\/strong> i <strong>poreme\u0107aja<\/strong> zajedni\u010dkog moda za mjerni sustav, \u010dime se izoliraju strujna\/magnetska polja od referentne elektrode. Hanna proizvodi niz modela s odgovaraju\u0107im dizajnom igle za <strong>sigurna precizna pH<\/strong> mjerenja.<\/p>\n<p>Ovaj se problem tako\u0111er mo\u017ee rije\u0161iti kori\u0161tenjem <a href=\"https:\/\/www.hannaservice.eu\/titanium-body-ph-electrode-for-wastewater-with-quick-connect-din-connector-hi12963-product\" target=\"_blank\" rel=\"noopener\"><strong>elektroda s tijelom od titana<\/strong><\/a> (Slika 13). Kavez od titana djeluje kao Faradayev kavez i \u0161titi unutarnji dio elektrode od vanjske buke.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a5206db elementor-widget elementor-widget-image\" data-id=\"a5206db\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hannaservice.eu\/titanium-body-ph-electrode-for-wastewater-with-quick-connect-din-connector-hi12963-product\" target=\"_blank\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"524\" height=\"71\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2023\/05\/hi1296-e1684434795161.jpg\" class=\"attachment-full size-full wp-image-207427\" alt=\"\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Slika 13: Hanna Instruments HI1296 elektroda<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2570f22 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2570f22\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-145cc8c\" data-id=\"145cc8c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2635a02 elementor-widget elementor-widget-text-editor\" data-id=\"2635a02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3 style=\"text-align: center;\"><strong>Niste sigurni koja bi elektroda bila najbolja za va\u0161 uzorak?<\/strong><\/h3>\n<p style=\"text-align: center;\">Obratite se na\u0161oj tehni\u010dkoj slu\u017ebi na <a class=\"keychainify-checked\" href=\"mailto:info@hannaservice.eu\"><strong>info@hannainst.hr<\/strong><\/a> ili pomo\u0107u na\u0161eg <strong><a href=\"https:\/\/www.hannaservice.eu\/contact-us\" target=\"_blank\" rel=\"noopener\">kontakt obrasca<\/a><\/strong>.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-947041e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"947041e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4e5fbe2\" data-id=\"4e5fbe2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e2343e7 elementor-widget elementor-widget-text-editor\" data-id=\"e2343e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Izvori:<\/strong><\/p>\n<ol>\n<li>Jensen, William B. (2004). &#8220;The Symbol for pH&#8221; (PDF). Journal of Chemical Education.<\/li>\n<li>Harris C. Daniel (2010). Quantitative Chemical Analysis, 8th Edition. H. Freeman and Company, New York<\/li>\n<\/ol>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-994a7e6 elementor-widget elementor-widget-spacer\" data-id=\"994a7e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5af0c9b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5af0c9b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-9546919\" data-id=\"9546919\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f855640 elementor-widget elementor-widget-image\" data-id=\"f855640\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"252\" height=\"74\" src=\"https:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2022\/08\/Logo-Hanna-Inst.jpg\" class=\"attachment-large size-large wp-image-177341\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba1b93c elementor-widget elementor-widget-text-editor\" data-id=\"ba1b93c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>With Great Product<br \/>Come Great Results<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6e01b03\" data-id=\"6e01b03\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-285e71f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"285e71f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-e126034\" data-id=\"e126034\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7d93c36 elementor-widget elementor-widget-heading\" data-id=\"7d93c36\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Servis <\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-b4051a5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b4051a5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-ead5684\" data-id=\"ead5684\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-026de0b elementor-widget elementor-widget-heading\" data-id=\"026de0b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Trening<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-e3a8c01 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e3a8c01\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-dd95147\" data-id=\"dd95147\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a2d781e elementor-widget elementor-widget-heading\" data-id=\"a2d781e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Popravak<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-8fc8b71 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8fc8b71\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-6d347c8\" data-id=\"6d347c8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-647bbb0 elementor-widget elementor-widget-heading\" data-id=\"647bbb0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Odr\u017eavanje<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>UZORCI MOGU BITI TE\u0160KI, ALI MJERENJE MO\u017dE BITI LAKO. pH vrijednost je klju\u010dni parametar za [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":207443,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[387],"tags":[],"class_list":["post-207731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratorij"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Odaberite pravu elektrodu za svoje uzorke - Hanna Instruments Hrvatska<\/title>\n<meta name=\"description\" content=\"pH je klju\u010dni parametar u prehrambenoj industriji, s pravom elektrodom mo\u017eete dobiti stabilne vrijednosti i s te\u0161kim uzorcima, provjerite na\u0161e!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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