{"id":179,"date":"2026-08-04T09:00:00","date_gmt":"2026-08-04T09:00:00","guid":{"rendered":"https:\/\/browsepeptides.com\/how-to-read-a-certificate-of-analysis\/"},"modified":"2026-08-25T22:58:50","modified_gmt":"2026-08-26T02:58:50","slug":"comment-lire-un-certificat-danalyse-de-peptide","status":"publish","type":"post","link":"https:\/\/browsepeptides.com\/fr\/how-to-read-peptide-certificate-of-analysis\/","title":{"rendered":"Comment lire un certificat d'analyse de peptide : le guide du chercheur"},"content":{"rendered":"<p class=\"bp-quick\"><strong>R\u00e9ponse rapide :<\/strong> Un certificat d'analyse (COA) est le document qui indique ce que contient r\u00e9ellement le flacon. Un COA de recherche utile confirme l'identit\u00e9 par spectrom\u00e9trie de masse, la puret\u00e9 par HPLC, et comporte le num\u00e9ro de lot qui relie le rapport au flacon sur votre table de laboratoire.<\/p>\n<h2>\u00c0 quoi sert un COA<\/h2>\n<p>Un certificat d&#x27;analyse (COA) est un rapport de laboratoire \u00e9tabli pour un lot sp\u00e9cifique de mati\u00e8re. Son r\u00f4le est simple : prouver que le compos\u00e9 correspond bien \u00e0 ce qui est indiqu\u00e9 sur l&#x27;\u00e9tiquette et pr\u00e9ciser son degr\u00e9 de puret\u00e9. Dans la recherche, cela est essentiel, car une substance non v\u00e9rifi\u00e9e introduit une variable que l\u2019on ne peut pas contr\u00f4ler. Si le peptide pr\u00e9sente une puret\u00e9 de 90% au lieu de 99%, chaque mesure en aval pr\u00e9sente un \u00e9cart d\u2019une ampleur inconnue.<\/p>\n<h2>Les quatre sections qui comptent<\/h2>\n<h3>1. Identit\u00e9<\/h3>\n<p>L'identit\u00e9 est confirm\u00e9e par spectrom\u00e9trie de masse (SM). Le laboratoire mesure la masse mol\u00e9culaire de l'\u00e9chantillon et la compare \u00e0 la masse th\u00e9orique de la s\u00e9quence. Une correspondance dans la tol\u00e9rance de l'instrument signifie que la bonne mol\u00e9cule est pr\u00e9sente. Recherchez la masse observ\u00e9e, la masse attendue et une d\u00e9claration de r\u00e9ussite ou d'\u00e9chec.<\/p>\n<h3>2. Puret\u00e9<\/h3>\n<p>La puret\u00e9 est mesur\u00e9e par chromatographie liquide \u00e0 haute performance (CLHP). L&#x27;\u00e9chantillon est s\u00e9par\u00e9 en ses diff\u00e9rents composants et l&#x27;aire sous le pic principal est exprim\u00e9e en pourcentage du total. Une valeur de 99,2% signifie que 99,2% de la substance d\u00e9tect\u00e9e correspondait au peptide cible. Demandez le chromatogramme, et pas seulement le chiffre, afin de pouvoir v\u00e9rifier s&#x27;il existe des pics secondaires.<\/p>\n<h3>3. Num\u00e9ro de lot et de s\u00e9rie<\/h3>\n<p>Le num\u00e9ro de lot sur le COA doit correspondre au num\u00e9ro figurant sur le flacon. Un COA sans num\u00e9ro de lot, ou r\u00e9utilis\u00e9 pour diff\u00e9rents produits, ne vous apprend rien sur le produit que vous avez entre les mains.<\/p>\n<h3>4. Le laboratoire d'essais<\/h3>\n<p>Un certificat d&#x27;analyse (COA) doit mentionner le nom du laboratoire qui a r\u00e9alis\u00e9 l&#x27;analyse et vous fournir un moyen de la v\u00e9rifier. Le terme \u00ab tiers \u00bb signifie que le fournisseur n&#x27;a pas r\u00e9alis\u00e9 l&#x27;analyse lui-m\u00eame. Si le fournisseur est \u00e9galement le laboratoire, consid\u00e9rez le rapport comme une affirmation plut\u00f4t que comme une preuve.<\/p>\n<h2>Signaux d&#x27;alerte<\/h2>\n<ul>\n<li>Il n&#x27;y a pas de num\u00e9ro de lot, ou celui-ci ne correspond pas au flacon.<\/li>\n<li>Une valeur de puret\u00e9 sans chromatogramme.<\/li>\n<li>Un rapport g\u00e9n\u00e9rique dans lequel le nom du produit a \u00e9t\u00e9 saisi, mais qui ne contient aucune donn\u00e9e relative \u00e0 l&#x27;instrument.<\/li>\n<li>Un laboratoire que vous ne pouvez ni trouver ni contacter.<\/li>\n<li>Un rapport datant de plusieurs ann\u00e9es avant la mise en ligne du produit.<\/li>\n<\/ul>\n<h2>Comment Browse Peptides publie les certificats d&#x27;analyse (COA)<\/h2>\n<p>Chaque lot que nous proposons est test\u00e9 par un laboratoire ind\u00e9pendant avant sa mise en vente. Le rapport est publi\u00e9 sur notre page \u00ab Certificats d&#x27;analyse \u00bb avec le num\u00e9ro de lot, et une copie imprim\u00e9e est jointe \u00e0 la commande afin que le flacon et le document soient livr\u00e9s ensemble.<\/p>\n<h2>Sources<\/h2>\n<ul class=\"bp-sources\">\n<li>Conseil international d&#x27;harmonisation, ICH Q6B : Sp\u00e9cifications relatives aux produits biotechnologiques et biologiques.<\/li>\n<li>Pharmacop\u00e9e des \u00c9tats-Unis, chapitre g\u00e9n\u00e9ral 621, Chromatographie.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>R\u00e9ponse rapide : un certificat d'analyse (COA) est le document qui indique ce que contient r\u00e9ellement le flacon. Un COA de recherche utile confirme l'identit\u00e9 par spectrom\u00e9trie de masse, la puret\u00e9 par HPLC, et comporte le num\u00e9ro de lot qui relie le rapport au flacon sur votre table de travail.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","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":"","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":"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":"","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-4)","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-4)","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-4)","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":[34],"tags":[],"class_list":["post-179","post","type-post","status-publish","format-standard","hentry","category-research-education"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Quick answer: a Certificate of Analysis (COA) is the document that states what is actually in the vial. 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A useful research COA confirms identity by mass spectrometry, purity by HPLC, and carries the batch number that ties the report to the vial on your bench."},"aioseo_meta_data":{"post_id":"179","title":null,"description":null,"keywords":null,"keyphrases":null,"focus_keyword":null,"additional_keywords":null,"truseo_locale":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_custom_url":null,"og_image_custom_fields":null,"og_image_url":null,"og_image_width":null,"og_image_height":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_image_url":null,"twitter_title":null,"twitter_description":null,"schema_type":"default","schema_type_options":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null,"created":"2026-09-05 19:34:36","updated":"2026-09-05 19:34:36"},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/browsepeptides.com\/fr\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/browsepeptides.com\/fr\/category\/research-education\/\" title=\"Research &amp; Education\">Research &amp; Education<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHow to Read a Peptide Certificate of Analysis: A Researcher\u2019s Guide\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/browsepeptides.com\/fr"},{"label":"Research &amp; Education","link":"https:\/\/browsepeptides.com\/fr\/category\/research-education\/"},{"label":"How to Read a Peptide Certificate of Analysis: A Researcher&#8217;s Guide","link":"https:\/\/browsepeptides.com\/fr\/how-to-read-peptide-certificate-of-analysis\/"}],"_links":{"self":[{"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/posts\/179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/comments?post=179"}],"version-history":[{"count":1,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/posts\/179\/revisions"}],"predecessor-version":[{"id":244,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/posts\/179\/revisions\/244"}],"wp:attachment":[{"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/media?parent=179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/categories?post=179"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/browsepeptides.com\/fr\/wp-json\/wp\/v2\/tags?post=179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}