{"id":154620,"date":"2020-08-20T10:22:33","date_gmt":"2020-08-20T10:22:33","guid":{"rendered":"https:\/\/blog.hannaservice.eu\/potrebne-su-vam-precizne-karl-fischer-titracije-pocnite-sa-standardizacijom-titranta-koji-koristite\/"},"modified":"2022-10-10T08:52:37","modified_gmt":"2022-10-10T08:52:37","slug":"potrebne-su-vam-precizne-karl-fischer-titracije-pocnite-sa-standardizacijom-titranta-koji-koristite","status":"publish","type":"post","link":"https:\/\/blog.hannaservice.eu\/sr\/potrebne-su-vam-precizne-karl-fischer-titracije-pocnite-sa-standardizacijom-titranta-koji-koristite\/","title":{"rendered":"Potrebne su Vam precizne Karl Fischer titracije? Po\u010dnite sa standardizacijom titranta koji koristite."},"content":{"rendered":"\t\t
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Nisu svi standardi jednaki!<\/strong><\/h1>\n

Karl Fischer titracije su odli\u010dan i pogodan na\u010din za odre\u0111ivanje sadr\u017eaja vlage u razli\u010ditim uzorcima. Po prirodi, titrani i rastvara\u010di koji su uklju\u010deni u Karl Fischerovu reakciju privla\u010de i reaguju sa vodom. To zna\u010di bilo koja voda \u2013 voda u Va\u0161em uzorku, voda iz atmosferske vlage u staklenoj posudi i voda u vazduhu u prostoru za glavu kad otvorite bocu titanta. Stoga je izuzetno va\u017eno da standardizujete svoj Karl Fischer titrant pre upotrebe i \/ ili redovno. Po\u0161to morate da standardizujete svoj titrant, koji standard treba da koristite?<\/p>\n

\u0160ta su Karl Fischer standardi?<\/strong><\/h2>\n

Karl Fischer\u00a0standardi su sertifikovane hemikalije sa fiksnim sadr\u017eajem vode koje se mogu koristiti za standardizaciju (utvr\u0111ivanje prave vrednosti) Karl Fischer titranata. Postoji nekoliko vrsta standarda: tablete, prah, te\u010dnost i ampule.<\/p>\n

Da li su standardi neophodni?<\/h2>\n

Ako ste prethodno pokrenuli standardne titracije na potenciometrijskom titratoru, postoji \u0161ansa da c\u0301e vam biti re\u010deno da Va\u0161 odre\u0111eni titrant ne treba da se standardizuje. Karl Fischer-titran nije nu\u017eno tako robustan i stabilan skladi\u0161ten na policama kao ostali titanti. To je zbog \u010dinjenice da oni komuniciraju sa vodom. Ambijentalna atmosferska vlaga je dovoljna da titrant izgubi moc\u0301. Veoma je va\u017eno, posebno ako je boca titanta ranije otvorena, da je standardizovana pre upotrebe. U suprotnom, vrednost koja se nalazi u titratoru za snagu titranta nec\u0301e biti ta\u010dna, a to c\u0301e dovesti do neta\u010dnih rezultata.<\/p>\n

Tro\u0161kovi, obja\u0161njeni<\/h2>\n

Mnogo je stvari o kojima ljudi razmi\u0161ljaju kada poku\u0161aju da odlu\u010de koja je najbolja opcija za njih i njihovu specifi\u010dnu primenu. Na listi pririteta prilikom razmatranja nalaze se tro\u0161kovi. Koliko bi trebalo da ko\u0161taju standardi? Koliko ko\u0161ta izvo\u0111enje po testu? Koja vrsta standarda je najekonomi\u010dnija? Hajde da ih popi\u0161emo sve! Generalno gledano, po testu, od najjeftinijeg do najskupljeg standarda, standardi se kre\u0107u od natrijum-tartarata (prah), preko te\u010dnih (u boci)do ampula.\u00a0Standardi u amulama\u00a0su novi na tr\u017ei\u0161tu.<\/p>\n\n\n\n\n\n\n\n\n\n
Standard<\/td>\n# od mLs, grama, delove po pakovanju,<\/td>\nzapremine, mase, delova po replikaciji<\/td>\nTro\u0161kovi po pakovanju<\/td>\nTrok\u0161kovi po replikaciji<\/td>\nProcenjen tro\u0161ak 5 replikanata<\/td>\n<\/tr>\n
HYDRANALTM<\/sup>\u00a0vodeni standard 1.0<\/td>\n40 mL<\/td>\n2 mL<\/td>\noko 100<\/td>\n5 evra<\/td>\n25 evra<\/td>\n<\/tr>\n
HYDRANALTM<\/sup>\u00a0Standard 5.0<\/td>\n100 mL<\/td>\n1 mL<\/td>\n25 evra<\/td>\n0.3 evra<\/td>\n1,5 evro<\/td>\n<\/tr>\n
HYDRANALTM<\/sup>\u00a0Standard 10.0<\/td>\n80 mL<\/td>\n1 mL<\/td>\noko 100<\/td>\n1.5 evro<\/td>\n6 evra<\/td>\n<\/tr>\n
Natrijum-tartarat<\/td>\n100 g<\/td>\n0.08 g<\/td>\n~ 55 evra<\/td>\n~ 0,05 evra<\/td>\n0,20 evra<\/td>\n<\/tr>\n
FASTRATE ampule 2mg H2O<\/td>\n15 komada<\/td>\n1 komad<\/td>\nnedostupne<\/td>\nnedostupne<\/td>\nnedostupne<\/td>\n<\/tr>\n
FASTRATE ampule 10mg H2O<\/td>\n15 komada<\/td>\n1 komad<\/td>\nnedostupne<\/td>\nnedostupne<\/td>\nnedostupne<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Koja je razlika izme\u0111u standarda?<\/h2>\n

<\/p>\n

Druga stvar koji treba da uzmete u razmatranje prilikom nabavke KF standarda je ta\u010dnost. Od najmanje ta\u010dnih do najta\u010dnijih titranti su: pra\u0161ak i \/ ili tableta, te\u010dnost, a zatim ampule. Koji je najbolji za Va\u0161u primenu? Svi donji grafikoni pokazuju ponovljivost i ta\u010dnost standarda koji se izvode na titarima Hanna Instruments Karla Fischera. Proverite ispod.<\/p>\n

Natrijum-tartarat dihidrat<\/h3>\n

\u010cvrsti i pra\u0161kasti standardi obi\u010dno se prave od hemikalije koja se naziva natrijum-tartarat dihidrat. To je jeftin nehigroskopski prah bez te\u010dnosti. Ova vrsta standarda treba da se koristi samo u sistemu Karl Fischer koji koristi titrant ja\u010dine 5 mg \/ L. Velika snaga titrana potrebna je zbog visokog sadr\u017eaja vode u standardu. \u010cak i uz vec\u0301u ja\u010dinu titranata, i dalje c\u0301ete morati da koristite veoma male koli\u010dine standarda (0,05 g do 0,10 g), u suprotnom mo\u017eete iscrpiti c\u0301eliju titratora. Visok sadr\u017eaj vode uparen sa \u010dvrstim standardom tako\u0111e zna\u010di da se mo\u017ee koristiti samo na volumetrijskom titratoru.<\/p>\n

Natrijum-tartarat dihidrat ima ograni\u010denu rastvorljivost u metanolu, koja je klju\u010dna komponenta u Karl Fischer hemikalijama. Drugim re\u010dima, ne samo da c\u0301ete morati da koristite veoma male koli\u010dine standarda kada ga pokrec\u0301ete zbog visokog sadr\u017eaja vode, vec\u0301 i da ne iscrpite c\u0301eliju. Kapacitet rastvara\u010da za ovaj standard je samo oko 2 g na 50 ml. Ako va\u0161a metoda zahteva ketonske \/ aldehidne reagense ili reagense na bazi etanola, ovaj standard nec\u0301e raditi (nerastvorljiv je).<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
** Kontrola kvaliteta instrumentacije nakon ove replike proverava da li c\u0301elija i sistem i dalje funkcioni\u0161u u pravim specifikacijama.<\/p>\n<\/caption>\n
HYDRANALTM<\/sup>\u00a0Natrijum-tartarat dihidrat<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n0.0795<\/td>\n2.5518<\/td>\n6:07<\/td>\n11.5<\/td>\n158.15<\/td>\n<\/tr>\n
2<\/td>\n0.0799<\/td>\n2.5568<\/td>\n8:10<\/td>\n11.5<\/td>\n157.37<\/td>\n<\/tr>\n
3**<\/td>\n0.0793<\/td>\n2.5278<\/td>\n6:03<\/td>\n2.8<\/td>\n157.72<\/td>\n<\/tr>\n
4<\/td>\n0.0797<\/td>\n2.5803<\/td>\n6:05<\/td>\n5.3<\/td>\n160.00<\/td>\n<\/tr>\n
5<\/td>\n0.0796<\/td>\n2.5544<\/td>\n6:02<\/td>\n5.3<\/td>\n158.59<\/td>\n<\/tr>\n
6**<\/td>\n0.0797<\/td>\n2.5428<\/td>\n6:04<\/td>\n8.0<\/td>\n157.46<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n158.21<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna devijacija<\/strong><\/td>\n0.9864<\/strong> <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n0.6235<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% Oporavak<\/strong><\/td>\n101.03<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

HydranalTM<\/sup>\u00a0Standard 5.0<\/h3>\n

Te\u010dni standardi su me\u0161avina ksilena sa fiksnim sadr\u017eajem vode Obi\u010dno su u malim bocama i treba ih \u010duvati u ne-zaplajivom ormanu. Ova vrsta standarda je rastvorljiva sa vec\u0301inom rastvara\u010da. Tro\u0161kovi su umereni. Te\u010dni standardi su manje ta\u010dni od ampula, ali ta\u010dniji od \u010dvrstih.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
HYDRANALTM<\/sup>\u00a0Standard 5.0 na 1 mL<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n0.9451<\/td>\n1.178<\/td>\n3:44<\/td>\n6.8<\/td>\n5.810<\/td>\n<\/tr>\n
2<\/td>\n0.9122<\/td>\n1.148<\/td>\n3:34<\/td>\n1.9<\/td>\n5.680<\/td>\n<\/tr>\n
3<\/td>\n0.9855<\/td>\n1.177<\/td>\n3:38<\/td>\n2.2<\/td>\n5.823<\/td>\n<\/tr>\n
4<\/td>\n0.9992<\/td>\n1.193<\/td>\n3:40<\/td>\n1.2<\/td>\n5.905<\/td>\n<\/tr>\n
5<\/td>\n0.9781<\/td>\n1.178<\/td>\n3:34<\/td>\n5.0<\/td>\n5.818<\/td>\n<\/tr>\n
6<\/td>\n0.9905<\/td>\n1.179<\/td>\n3:36<\/td>\n4.3<\/td>\n5.827<\/td>\n<\/tr>\n
7<\/td>\n0.9789<\/td>\n1.163<\/td>\n3:38<\/td>\n3.7<\/td>\n5.747<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n5.801<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna devijacija<\/strong><\/td>\n0.07055<\/strong> <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n1.216<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% Oporavak<\/strong><\/td>\n99.51<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Standardi u ampulama<\/h3>\n

Standardi u ampulama dolaze u razli\u010ditim koncentracijama i najta\u010dniji su dostupni vodeni standard. Oni su istovremeno i najskuplji. Me\u0161avina ksilena u ampulama sertifikovana je sa fiksnim sadr\u017eajem vode i dizajnirana je za jednokratnu upotrebu. Ovi standardi se mogu koristiti i u volumetrijskim i u kulometrijskim titratorima.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
HYDRANALTM<\/sup>\u00a0Standard 10.0, standardizacija titranta<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n1.0924<\/td>\n2.2707<\/td>\n5:57<\/td>\n6.3<\/td>\n4.837<\/td>\n<\/tr>\n
2<\/td>\n1.1517<\/td>\n2.3606<\/td>\n6:07<\/td>\n6.1<\/td>\n4.904<\/td>\n<\/tr>\n
3<\/td>\n1.1331<\/td>\n2.2939<\/td>\n6:05<\/td>\n6.5<\/td>\n4.967<\/td>\n<\/tr>\n
4<\/td>\n1.0542<\/td>\n2.1342<\/td>\n5:51<\/td>\n9.3<\/td>\n4.975<\/td>\n<\/tr>\n
5<\/td>\n1.0639<\/td>\n2.1057<\/td>\n5:47<\/td>\n9.9<\/td>\n5.090<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n4.955<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna devijacija<\/strong><\/td>\n0.09369 <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n1.891<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
** Kontrola kvaliteta instrumentacije nakon ove replike da bi se proverilo da li je c\u0301elija i sistem jo\u0161 uvek funkcionalan u pravim specifikacijama.<\/p>\n<\/caption>\n
HYDRANALTM<\/sup>\u00a0Standard 1.0 (Ampule) na 2 mL<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n2.120<\/td>\n0.4427<\/td>\n2:20<\/td>\n5.0<\/td>\n1.091<\/td>\n<\/tr>\n
2<\/td>\n2.061<\/td>\n0.4352<\/td>\n2:12<\/td>\n4.6<\/td>\n1.073<\/td>\n<\/tr>\n
3**<\/td>\n2.112<\/td>\n0.4372<\/td>\n2:19<\/td>\n3.3<\/td>\n1.079<\/td>\n<\/tr>\n
4<\/td>\n2.112<\/td>\n0.4369<\/td>\n2:23<\/td>\n9.9<\/td>\n1.070<\/td>\n<\/tr>\n
5**<\/td>\n2.068<\/td>\n0.4277<\/td>\n2:10<\/td>\n4.6<\/td>\n1.055<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n1.074<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna devijacija<\/strong><\/td>\n0.01330<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n1.239<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% Oporavak<\/strong><\/td>\n106.94**<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Standardi u tabletama<\/h3>\n

Standardi u tabletama su za jednokratnu upotrebu, kompresovani, \u010dvrsti vodeni standard. Tablete su dizajnirane za upotrebu u volumetrijskim titratorima. Ovi NIST sledljivi standardi mogu se me\u0161ati u reagensima Karl Fischer i imaju dobru ponovljivost i ta\u010dnost. Oni su najnoviji na tr\u017ei\u0161tu.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
** Kontrola kvaliteta instrumentacije nakon ove replike da bi se proverilo da li je c\u0301elija i sistem jo\u0161 uvek funkcionalan u pravim specifikacijama.<\/p>\n<\/caption>\n
FASTRATE Tablets 2 mg H2<\/sub>O<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n1 komad<\/td>\n0.4362<\/td>\n3:12<\/td>\n7.4<\/td>\n2.138<\/td>\n<\/tr>\n
2<\/td>\n1 komad<\/td>\n0.4472<\/td>\n3:24<\/td>\n9.3<\/td>\n2.184<\/td>\n<\/tr>\n
3**<\/td>\n1 komad<\/td>\n0.4512<\/td>\n3:35<\/td>\n5.6<\/td>\n2.16<\/td>\n<\/tr>\n
4<\/td>\n1 komad<\/td>\n0.439<\/td>\n3:07<\/td>\n13.6<\/td>\n2.133<\/td>\n<\/tr>\n
5<\/td>\n1 komad<\/td>\n0.4312<\/td>\n3:03<\/td>\n5.0<\/td>\n2.122<\/td>\n<\/tr>\n
6**<\/td>\n1 komad<\/td>\n0.4371<\/td>\n3:00<\/td>\n7.7<\/td>\n2.143<\/td>\n<\/tr>\n
7<\/td>\n1 komad<\/td>\n0.4525<\/td>\n3:00<\/td>\n12.4<\/td>\n3:00<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n2.163<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna Devijacija<\/strong><\/td>\n0.03808<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n1.761<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% Oporavak<\/strong><\/td>\n103.48<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
** Kontrola kvaliteta instrumentacije nakon ove replike da bi se proverilo da li je c\u0301elija i sistem jo\u0161 uvek funkcionalan u pravim specifikacijama.<\/p>\n<\/caption>\n
FASTRATE Tablets 10 mg of H2<\/sub>O<\/strong><\/td>\n<\/tr>\n
Replikacija<\/strong><\/td>\ng uzorka<\/strong><\/td>\nmL Titrant<\/strong><\/td>\nVreme<\/strong><\/td>\nDrift (ug\/min)<\/strong><\/td>\nmg\/mL analit<\/strong><\/td>\n<\/tr>\n
1<\/td>\n1 komad<\/td>\n2.146<\/td>\n1.9<\/td>\n6:55<\/td>\n10.62<\/td>\n<\/tr>\n
2<\/td>\n1 komad<\/td>\n2.185<\/td>\n9.6<\/td>\n5:18<\/td>\n10.78<\/td>\n<\/tr>\n
3**<\/td>\n1 komad<\/td>\n2.185<\/td>\n13.9<\/td>\n6:10<\/td>\n10.74<\/td>\n<\/tr>\n
4<\/td>\n1 komad<\/td>\n2.195<\/td>\n6.8<\/td>\n6:41<\/td>\n10.83<\/td>\n<\/tr>\n
5<\/td>\n1 komad<\/td>\n2.131<\/td>\n7.7<\/td>\n5:56<\/td>\n10.51<\/td>\n<\/tr>\n
6**<\/td>\n1 komad<\/td>\n2.231<\/td>\n12.1<\/td>\n5:23<\/td>\n10.99<\/td>\n<\/tr>\n
7<\/td>\n1 komad<\/td>\n2.166<\/td>\n9.6<\/td>\n6:49<\/td>\n10.67<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nProsek<\/strong><\/td>\n10.73<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\nStandardna devijacija<\/strong><\/td>\n0.1540<\/strong> <\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% RSD<\/strong><\/td>\n1.435<\/strong><\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n% Oporavak<\/strong><\/td>\n100.87<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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>\n\t\t","protected":false},"excerpt":{"rendered":"

Nisu svi standardi jednaki! Karl Fischer titracije su odli\u010dan i pogodan na\u010din za odre\u0111ivanje sadr\u017eaja […]<\/p>\n","protected":false},"author":17,"featured_media":152642,"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":[377],"tags":[],"class_list":["post-154620","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratorija"],"yoast_head":"\nPotrebne su Vam precizne Karl Fischer titracije? 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