{"id":3439,"date":"2026-10-05T03:29:01","date_gmt":"2026-10-05T03:29:01","guid":{"rendered":"https:\/\/nhdbio.com\/?p=3439"},"modified":"2026-10-15T03:51:37","modified_gmt":"2026-10-15T03:51:37","slug":"exemple-de-resolution-de-pics-qui-se-chevauchent-en-clhp-de-peptides","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/fr\/peptide-hplc-overlapping-peaks-resolution-example\/","title":{"rendered":"Un pic HPLC peut cacher deux composants : apprenez \u00e0 lire la s\u00e9paration"},"content":{"rendered":"<p>Un chromatogramme pr\u00e9sente un grand pic. Cela signifie-t-il que l'\u00e9chantillon ne contient qu'un seul composant ? Pas n\u00e9cessairement. Deux composants qui arrivent proches l'un de l'autre peuvent produire un signal qui ressemble \u00e0 un seul pic. Voici comment cela se produit.<\/p>\n<h2>D'abord, que montre un pic ?<\/h2>\n<p>Dans HPLC, un \u00e9chantillon traverse une colonne. Diff\u00e9rents composants peuvent la traverser \u00e0 des vitesses diff\u00e9rentes. Le d\u00e9tecteur enregistre leurs signaux \u00e0 leur sortie : le temps est port\u00e9 sur l'axe horizontal, et l'intensit\u00e9 du signal sur l'axe vertical.<\/p>\n<p>Lorsque deux composants sortent presque en m\u00eame temps, le d\u00e9tecteur peut enregistrer une forme combin\u00e9e plut\u00f4t que deux pics clairement s\u00e9par\u00e9s.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/1.png\" alt=\"Figure 1. Deux composants invent\u00e9s peuvent produire un seul pic combin\u00e9 du d\u00e9tecteur.\"><figcaption>Figure 1. Deux signaux p\u00e9dagogiques qui se chevauchent peuvent ressembler \u00e0 un seul pic.<\/figcaption><\/figure>\n<h2>Pourquoi une meilleure s\u00e9paration change la donne<\/h2>\n<p>Imaginez deux groupes qui franchissent une porte. S'ils arrivent en m\u00eame temps, vous pouvez les compter comme une seule foule. S'ils arrivent \u00e0 des moments diff\u00e9rents, les groupes sont plus faciles \u00e0 distinguer. La s\u00e9paration dans la colonne remplit un r\u00f4le similaire.<\/p>\n<p>Dans le second graphique p\u00e9dagogique, les deux pics sont plus \u00e9loign\u00e9s. Cela rend chacun plus facile \u00e0 examiner et \u00e0 mesurer. Ce sont des courbes simul\u00e9es, et non un test avant-apr\u00e8s d'un lot NHD.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/2.png\" alt=\"Figure 2. Une s\u00e9paration plus grande r\u00e9v\u00e8le les deux composants mod\u00e9lis\u00e9s.\"><figcaption>Figure 2. Des pics s\u00e9par\u00e9s sont plus faciles \u00e0 examiner individuellement.<\/figcaption><\/figure>\n<h2>Utilisez un nombre pour d\u00e9crire l'\u00e9cart entre les pics<\/h2>\n<p>Resolution, written Rs, compares the gap between two peak times with their widths. For this example, use widths measured at the baseline: Rs = 2 \u00d7 (second time \u2212 first time) \u00f7 (first width + second width).<\/p>\n<p>The peaks occur at 5.0 and 5.6 minutes, with baseline widths of 0.4 minutes each. Rs = 2 \u00d7 0.6 \u00f7 0.8 = 1.5. A wider gap or narrower peaks gives a larger value.<\/p>\n<p>Do not mix baseline widths with half-height widths; they use different formulas. Also, 1.5 is this example\u2019s answer, not an acceptance rule for every method.<\/p>\n<h2>Pourquoi cela compte pour la puret\u00e9<\/h2>\n<p>Un calcul de puret\u00e9 bas\u00e9 sur l'aire d\u00e9pend des signaux que la m\u00e9thode s\u00e9pare, d\u00e9tecte et compte. Si un autre composant se cache sous le pic cible, son signal peut \u00eatre inclus dans cette aire.<\/p>\n<p>Lisez donc tout le chromatogramme et la m\u00e9thode, pas seulement le pourcentage. La forme du pic seule ne peut pas non plus vous indiquer l'identit\u00e9 de chaque composant.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/3.png\" alt=\"Figure 3. Pour des largeurs \u00e0 la base de 0.4 min et des temps de 5.0 et 5.6 min, la r\u00e9solution p\u00e9dagogique est de 1.5.\"><figcaption>Figure 3. La s\u00e9paration des pics et la s\u00e9lection de la zone influent sur l'interpr\u00e9tation.<\/figcaption><\/figure>\n<h2>Essayez une paire de pics plus rapproch\u00e9s<\/h2>\n<p>Gardez les deux largeurs de ligne de base \u00e0 0.4 minutes, mais d\u00e9placez le second pic \u00e0 5.2 minutes. L'\u00e9cart n'est plus que de 0.2 minutes.<\/p>\n<div class=\"exercise\"><strong>Quel est le Rs pour des pics \u00e0 5.0 et 5.2 minutes ?<\/strong><\/p>\n<details>\n<summary>Voir la r\u00e9ponse<\/summary>\n<p>2 \u00d7 0.2 \u00f7 0.8 = 0.5. The smaller value reflects a smaller gap relative to peak width.<\/p>\n<\/details>\n<\/div>\n<h2>Lecture des informations d'analyse GHK-Cu ou KPV<\/h2>\n<p>Pour GHK-Cu ou KPV, demandez quels enregistrements d'analyse sont disponibles et comment le signal cible a \u00e9t\u00e9 identifi\u00e9. Si un chiffre de puret\u00e9 est fourni, lisez-le avec sa m\u00e9thode et le trac\u00e9 complet.<\/p>\n<p><a href=\"https:\/\/nhdbio.com\/fr\/produits\/ghk-cu\/\">GHK-Cu<\/a> \/ <a href=\"https:\/\/nhdbio.com\/fr\/produits\/kpv\/\">KPV<\/a><\/p>\n<p><a href=\"https:\/\/nhdbio.com\/fr\/citation\/\">Discutez des exigences relatives au mat\u00e9riel et aux documents avec NHD<\/a> \u00b7 <a href=\"https:\/\/nhdbio.com\/fr\/methodes-danalyse\/interpretation-des-chromatogrammes\/\">Poursuivre avec le guide analytique<\/a><\/p>\n<footer><strong>Sources et notes explicatives<\/strong><\/p>\n<p>Les chiffres et les courbes sont des exemples p\u00e9dagogiques, et non des r\u00e9sultats d'essais sur des lots de produits. Sources v\u00e9rifi\u00e9es le 11 octobre 2026.<\/p>\n<ul>\n<li><a href=\"https:\/\/www.agilent.com\/about\/data-integrity\/en\/5-tips-chromatographic-integration.html\">Agilent \u00b7 chromatographic integration<\/a><\/li>\n<li><a href=\"https:\/\/database.ich.org\/sites\/default\/files\/ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\">ICH Q2(R2) \u00b7 analytical validation<\/a><\/li>\n<\/ul>\n<p>R\u00e9daction et r\u00e9vision des sources assist\u00e9es par IA. Les mat\u00e9riaux du catalogue sont destin\u00e9s \u00e0 la recherche, au d\u00e9veloppement et \u00e0 la fabrication, et non \u00e0 un usage humain ou v\u00e9t\u00e9rinaire.<\/p>\n<\/footer>","protected":false},"excerpt":{"rendered":"<p>D\u00e9couvrez pourquoi la forme du pic est importante avant de lire un pourcentage de puret\u00e9.<\/p>","protected":false},"author":1,"featured_media":3965,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"329,348,352,318","pim_article_type":"Practical research guide","pim_evidence_level":"Technical guidance with labeled teaching examples","pim_reviewer":"AI-assisted source and editorial check","pim_reviewed_date":"2026-10-11","pim_editorial_note":"Study results and labeled examples are separated. Original-source, arithmetic, readability and internal-link checks; no independent human peer review recorded.","pim_review_status":"reviewed","pim_review_reason":"Teaching examples, arithmetic, source links and plain language checked; product enquiries linked.","pim_creation_method":"AI-assisted writing and source checks; conceptual illustrated cover.","pim_sources":"[{\"title\":\"ICH Q2(R2): Validation of Analytical Procedures\",\"note\":\"Defines validation characteristics and distinguishes quantitative analytical purposes.\",\"url\":\"https:\/\/www.fda.gov\/regulatory-information\/search-fda-guidance-documents\/q2r2-validation-analytical-procedures\"},{\"title\":\"Agilent: Five Tips for Chromatographic Integration\",\"note\":\"Agilent: Five Tips for Chromatographic Integration. Accessed 2026-10-05.\",\"url\":\"https:\/\/www.agilent.com\/about\/data-integrity\/en\/5-tips-chromatographic-integration.html\"},{\"title\":\"Teaching reference \u2014 database.ich.org \u2014 ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\",\"note\":\"\",\"url\":\"https:\/\/database.ich.org\/sites\/default\/files\/ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\"},{\"title\":\"Peptide Isolation \u2013 Method Development Considerations\",\"note\":\"Peptide Isolation \u2013 Method Development Considerations\",\"url\":\"https:\/\/www.waters.com\/nextgen\/gb\/en\/education\/primers\/practical-approaches-to-peptide-isolation\/method-development-considerations.html\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-3439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evidence-quality-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>One HPLC Peak Can Hide Two Components: Learn to Read Separation | NHD<\/title>\n<meta name=\"description\" content=\"Learn why peak shape matters before you read a purity percentage.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nhdbio.com\/fr\/exemple-de-resolution-de-pics-qui-se-chevauchent-en-clhp-de-peptides\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"One HPLC Peak Can Hide Two Components: Learn to Read Separation\" \/>\n<meta property=\"og:description\" content=\"Learn why peak shape matters before you read a purity percentage.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nhdbio.com\/fr\/exemple-de-resolution-de-pics-qui-se-chevauchent-en-clhp-de-peptides\/\" \/>\n<meta property=\"og:site_name\" content=\"NHD\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-05T03:29:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-15T03:51:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/nhd-comic-3439.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"NHD Technical Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" content=\"Peptide Raw Materials and Custom Peptide Synthesis\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"NHD Technical Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-hplc-overlapping-peaks-resolution-example\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-hplc-overlapping-peaks-resolution-example\\\/\"},\"author\":{\"name\":\"NHD Technical Team\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/person\\\/0ffb0dec7fda0f720073fc468fac6fc1\"},\"headline\":\"One HPLC Peak Can Hide Two Components: Learn to Read Separation\",\"datePublished\":\"2026-10-05T03:29:01+00:00\",\"dateModified\":\"2026-10-15T03:51:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-hplc-overlapping-peaks-resolution-example\\\/\"},\"wordCount\":505,\"publisher\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-hplc-overlapping-peaks-resolution-example\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/nhd-comic-3439.jpg\",\"articleSection\":[\"Evidence &amp; 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