{"id":155260,"date":"2020-09-07T14:41:50","date_gmt":"2020-09-07T14:41:50","guid":{"rendered":"http:\/\/blog.hannaservice.eu\/regles-de-titrage-maintenance-et-entretien\/"},"modified":"2022-10-10T11:57:10","modified_gmt":"2022-10-10T11:57:10","slug":"regles-de-titrage-maintenance-et-entretien","status":"publish","type":"post","link":"https:\/\/blog.hannaservice.eu\/fr\/regles-de-titrage-maintenance-et-entretien\/","title":{"rendered":"R\u00e8gles de titrage \u2013 Maintenance et entretien"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"155260\" class=\"elementor elementor-155260 elementor-135513\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-62de72fe elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"62de72fe\" 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-6565fc0f\" data-id=\"6565fc0f\" 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-7e570491 elementor-widget elementor-widget-text-editor\" data-id=\"7e570491\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Un peu de TLC peut aller tr\u00e8s loin \u2026<\/h2>\n<p>Bien que les titreurs et les \u00e9quipements Hanna soient con\u00e7us pour \u00eatre des b\u00eates de somme, il est pr\u00e9f\u00e9rable de faire un peu de maintenance de temps en temps pour les maintenir en parfait \u00e9tat. Maintenant, cela ne doit pas \u00eatre trop long ou co\u00fbteux. Jetez un \u0153il \u00e0 ce blog pour d\u00e9couvrir nos meilleurs conseils et r\u00e8gles pour l\u2019entretien de votre \u00e9quipement de titrage.<\/p>\n<h2>Maintenance et entretien<\/h2>\n<h3># 8 Normalisation du titrant<\/h3>\n<p>L\u2019ensemble du principe du titrage repose sur le principe de l\u2019ajout d\u2019un titrant de concentration connue pour d\u00e9terminer la concentration inconnue de l\u2019analyte. Au fil du temps, l\u2019exposition \u00e0 l\u2019environnement peut entra\u00eener une modification de la concentration de r\u00e9actif. Si la concentration du r\u00e9actif varie de ce qui est programm\u00e9 dans le calcul, le r\u00e9sultat calcul\u00e9 du titrage sera inexact.<\/p>\n<p>Une standardisation r\u00e9guli\u00e8re de votre titrant est importante pour garantir que les r\u00e9sultats seront calcul\u00e9s correctement. Pour normaliser, un titrant est titr\u00e9 par rapport \u00e0 un autre standard fra\u00eechement pr\u00e9par\u00e9 d\u2019un calcul connu. Lors de la standardisation des titrants, il est pr\u00e9f\u00e9rable d\u2019ex\u00e9cuter plusieurs r\u00e9pliques, en garantissant une bonne r\u00e9p\u00e9tabilit\u00e9 entre les r\u00e9pliques, et de mettre \u00e0 jour l\u2019unit\u00e9 avec la moyenne des r\u00e9sultats.<\/p>\n<p>La vitesse \u00e0 laquelle la concentration d\u2019un titrant varie en fonction des conditions environnementales et de stockage, telles que l\u2019humidit\u00e9 relative. Une bonne r\u00e8gle de base est de normaliser votre titrant tous les mois si la bouteille n\u2019est pas compl\u00e8tement consomm\u00e9e dans ce laps de temps. Pendant des p\u00e9riodes prolong\u00e9es entre les tests, les flacons de titrant doivent \u00eatre ferm\u00e9s herm\u00e9tiquement et stock\u00e9s correctement et recalibr\u00e9s avant utilisation.<\/p>\n<p>Pour plus d\u2019informations sur la normalisation des titrants, contactez-nous!<\/p>\n<div>Contactez un expert en titrage Hanna Instruments d\u00e8s maintenant!<\/div>\n<h3># 9 Entretien de vos instruments et outils<\/h3>\n<p>Les instruments et outils de service et d\u2019\u00e9talonnage sont des \u00e9l\u00e9ments essentiels pour maintenir la pr\u00e9cision de l\u2019ensemble du syst\u00e8me. Les balances et les pipettes sont g\u00e9n\u00e9ralement \u00e9talonn\u00e9es en usine au moins une fois par an, mais nous vous sugg\u00e9rons de contacter votre fournisseur de ces outils pour obtenir des recommandations sp\u00e9cifiques concernant la fr\u00e9quence d\u2019\u00e9talonnage. Ici, nous nous concentrerons sur le service des titrateur potentiom\u00e9triques automatiques Hanna Instruments.<\/p>\n<h4><strong>Changer les pi\u00e8ces portables<\/strong><\/h4>\n<p>Une exposition prolong\u00e9e aux titrants peut entra\u00eener la d\u00e9gradation de la seringue en verre \u00e0 l\u2019int\u00e9rieur de la burette et du tube avec le temps. La d\u00e9gradation de ces composants peut provoquer des fuites qui peuvent \u00eatre dangereuses pour le personnel et l\u2019\u00e9lectronique du titrateur. Cela peut \u00e9galement provoquer l\u2019introduction d\u2019air dans le syst\u00e8me, ce dont nous avons d\u00e9j\u00e0 parl\u00e9 peut avoir un impact significatif sur les r\u00e9sultats de titrage. Vous trouverez ci-dessous des directives g\u00e9n\u00e9rales pour changer la seringue et la tubulure en fonction du type et de la force du titrant.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"\" src=\"http:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2021\/05\/HI931_HI932-Burette-1-300x157.jpg\" width=\"568\" height=\"299\" \/><\/p>\n<table border=\"1\" cellpadding=\"4\">\n<tbody>\n<tr>\n<td colspan=\"2\">Seringue<\/td>\n<\/tr>\n<tr>\n<td><strong>Titrant<\/strong><\/td>\n<td><strong>La fr\u00e9quence<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Caustique &lt;1N<\/td>\n<td>1 an<\/td>\n<\/tr>\n<tr>\n<td>Caustique&gt;1N<\/td>\n<td>6 mois<\/td>\n<\/tr>\n<tr>\n<td>Non aqueux<\/td>\n<td>1 an<\/td>\n<\/tr>\n<tr>\n<td>Tout titrant &gt;1N<\/td>\n<td>1 an<\/td>\n<\/tr>\n<tr>\n<td>La plupart des autres<\/td>\n<td>2 ans<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img decoding=\"async\" class=\"\" src=\"http:\/\/blog.hannaservice.eu\/wp-content\/uploads\/2021\/05\/HI900580-720x720-d537f40c-58f5-4f22-a30a-a2ac28583bbc-300x300.jpg\" width=\"478\" height=\"478\" \/><\/p>\n<table border=\"1\" cellpadding=\"4\">\n<tbody>\n<tr>\n<td colspan=\"2\">Tubes<\/td>\n<\/tr>\n<tr>\n<td><strong>Titrant<\/strong><\/td>\n<td><strong>La fr\u00e9quence<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Titrants qui cristallisent (c\u2019est-\u00e0-dire nitrate d\u2019argent)<\/td>\n<td>3 \u2013 6 Mois<\/td>\n<\/tr>\n<tr>\n<td>La plupart des autres<\/td>\n<td>1 an<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>Calibration de l\u2019\u00e9lectronique<\/h4>\n<p>Au fil du temps, l\u2019\u00e9talonnage des entr\u00e9es mV et temp\u00e9rature sur les titrateurs potentiom\u00e9triques peut d\u00e9river. Ces entr\u00e9es sont le signal \u00e9lectronique envoy\u00e9 par l\u2019\u00e9lectrode et la sonde de temp\u00e9rature au titrateur pour surveiller la r\u00e9action et d\u00e9terminer le point final. Afin de maintenir le\u00a0\u00b10.1 mV\u00a0d\u00e9claration de pr\u00e9cision du titrateur, Hanna recommande un \u00e9talonnage en usine de l\u2019\u00e9lectronique du titrateur chaque ann\u00e9e.<\/p>\n<h4>V\u00e9rification de la sant\u00e9 de l\u2019\u00e9lectrode<\/h4>\n<p>Avec une utilisation constante, les \u00e9lectrodes finiront par se d\u00e9grader et devront \u00eatre remplac\u00e9es. Un contr\u00f4le de pente est une technique qui peut \u00eatre utilis\u00e9e pour d\u00e9terminer la sant\u00e9 d\u2019une \u00e9lectrode. Les proc\u00e9dures sp\u00e9cifiques de v\u00e9rification de la pente se trouvent dans le manuel de l\u2019\u00e9lectrode. Pour les titrages au point d\u2019\u00e9quivalence, des pentes d\u2019\u00e9lectrode de 60 \u00e0 120% sont g\u00e9n\u00e9ralement fines \u00e0 utiliser pour le titrage. Les \u00e9lectrodes en dehors de cette plage de pente doivent \u00eatre consid\u00e9r\u00e9es comme \u00e9tant remplac\u00e9es. Pour les d\u00e9terminations du point final de pH, nous recommandons une plage de pente plus stricte de 85 \u00e0 105%. Les recommandations g\u00e9n\u00e9rales pour la dur\u00e9e de vie des \u00e9lectrodes sont ci-dessous, mais gardez \u00e0 l\u2019esprit que pour les environnements \u00e0 haut d\u00e9bit, une \u00e9lectrode de secours est toujours conseill\u00e9e.<\/p>\n<table border=\"1\" width=\"595\" cellpadding=\"4\">\n<tbody>\n<tr>\n<td colspan=\"2\">Quand devriez-vous remplacer votre \u00e9lectrode?<\/td>\n<\/tr>\n<tr>\n<td><strong>Type d\u2019\u00e9lectrode<\/strong><\/td>\n<td><strong>La fr\u00e9quence<\/strong><\/td>\n<\/tr>\n<tr>\n<td>pH<\/td>\n<td>18 \u2013 24 Mois<\/td>\n<\/tr>\n<tr>\n<td>R\u00e9dox<\/td>\n<td>3 Ann\u00e9es<\/td>\n<\/tr>\n<tr>\n<td>Utilisations \u00e0 l\u2019\u00e9tat solide<\/td>\n<td>3 Ann\u00e9es<\/td>\n<\/tr>\n<tr>\n<td>Membranes liquides pour ISEs<\/td>\n<td>Trimestriel<\/td>\n<\/tr>\n<tr>\n<td>\u00c9lectrodes en billette d\u2019argent<\/td>\n<td>3 Ann\u00e9es<\/td>\n<\/tr>\n<tr>\n<td>\u00c9lectrodes photom\u00e9triques<\/td>\n<td>3 Ann\u00e9es<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>#10 Op\u00e9rateurs de formation<\/h3>\n<p>Ce guide montre qu\u2019il existe de nombreuses bonnes pratiques \u00e0 prendre en compte lors de l\u2019ex\u00e9cution de titrages. Il peut parfois \u00eatre difficile pour ceux qui n\u2019ont pas de formation scientifique de garder tout cela \u00e0 l\u2019esprit, donc une formation p\u00e9riodique est essentielle pour maintenir des r\u00e9sultats pr\u00e9cis.<\/p>\n<p>Les SOPs et les fiches de bonnes pratiques publi\u00e9es sont des rappels utiles, mais Hanna recommande une formation de recyclage annuelle du personnel pour s\u2019assurer que les nouveaux employ\u00e9s acqui\u00e8rent les comp\u00e9tences dont ils ont besoin pour r\u00e9ussir et pour servir de rappel utile des meilleures pratiques pour les employ\u00e9s chevronn\u00e9s. Tenir et tenir \u00e0 jour de bons dossiers de formation peut en dire long lors d\u2019un audit de laboratoire, vous offrant ainsi la tranquillit\u00e9 d\u2019esprit.<\/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>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Un peu de TLC peut aller tr\u00e8s loin \u2026 Bien que les titreurs et les [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":152861,"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":[398],"tags":[],"class_list":["post-155260","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratoire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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