{"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":"exemplo-de-resolucao-de-picos-sobrepostos-em-hplc-de-peptideos","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/pt-br\/peptide-hplc-overlapping-peaks-resolution-example\/","title":{"rendered":"Um \u00fanico pico HPLC pode esconder dois componentes: aprenda a ler a separa\u00e7\u00e3o"},"content":{"rendered":"<p>Um cromatograma tem um pico grande. Isso significa que a amostra cont\u00e9m apenas um componente? N\u00e3o necessariamente. Dois componentes que chegam pr\u00f3ximos podem produzir um sinal que parece um \u00fanico pico. Veja como isso acontece.<\/p>\n<h2>Primeiro, o que um pico mostra?<\/h2>\n<p>Em HPLC, uma amostra passa por uma coluna. Componentes diferentes podem percorr\u00ea-la em velocidades diferentes. O detector registra seus sinais \u00e0 medida que saem: o tempo corre no eixo horizontal, e a intensidade do sinal no eixo vertical.<\/p>\n<p>Quando dois componentes saem quase juntos, o detector pode registrar uma forma combinada em vez de dois picos claramente separados.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/1.png\" alt=\"Figura 1. Dois componentes inventados podem produzir um \u00fanico pico combinado no detector.\"><figcaption>Figura 1. Dois sinais did\u00e1ticos sobrepostos podem parecer um \u00fanico pico.<\/figcaption><\/figure>\n<h2>Por que uma separa\u00e7\u00e3o melhor muda o quadro<\/h2>\n<p>Imagine dois grupos passando por uma porta. Se chegarem juntos, voc\u00ea pode cont\u00e1-los como uma s\u00f3 multid\u00e3o. Se chegarem em momentos diferentes, os grupos s\u00e3o mais f\u00e1ceis de distinguir. A separa\u00e7\u00e3o na coluna tem um prop\u00f3sito semelhante.<\/p>\n<p>No segundo gr\u00e1fico did\u00e1tico, os dois picos est\u00e3o mais distantes. Isso torna cada um mais f\u00e1cil de inspecionar e medir. Essas s\u00e3o curvas simuladas, n\u00e3o um teste de antes e depois de um lote de NHD.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/2.png\" alt=\"Figura 2. Uma separa\u00e7\u00e3o maior revela os dois componentes modelados.\"><figcaption>Figura 2. Picos separados s\u00e3o mais f\u00e1ceis de inspecionar individualmente.<\/figcaption><\/figure>\n<h2>Use um n\u00famero para descrever a dist\u00e2ncia entre os picos<\/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>Por que isso importa para a pureza<\/h2>\n<p>Um c\u00e1lculo de pureza baseado em \u00e1rea depende de quais sinais o m\u00e9todo separa, detecta e contabiliza. Se outro componente estiver oculto sob o pico alvo, seu sinal pode ser inclu\u00eddo nessa \u00e1rea.<\/p>\n<p>Portanto, leia todo o cromatograma e o m\u00e9todo, n\u00e3o apenas a porcentagem. A forma do pico sozinha tamb\u00e9m n\u00e3o pode informar a identidade de cada componente.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t06\/en\/3.png\" alt=\"Figura 3. Para larguras na linha de base de 0.4 min e tempos de 5.0 e 5.6 min, a resolu\u00e7\u00e3o did\u00e1tica \u00e9 1.5.\"><figcaption>Figura 3. A separa\u00e7\u00e3o de picos e a sele\u00e7\u00e3o de \u00e1rea afetam a interpreta\u00e7\u00e3o.<\/figcaption><\/figure>\n<h2>Tente um par de picos mais pr\u00f3ximo<\/h2>\n<p>Mantenha ambas as larguras de base em 0.4 minutos, mas mova o segundo pico para 5.2 minutos. A diferen\u00e7a agora \u00e9 de apenas 0.2 minutos.<\/p>\n<div class=\"exercise\"><strong>Qual \u00e9 o Rs para picos em 5.0 e 5.2 minutos?<\/strong><\/p>\n<details>\n<summary>Ver a resposta<\/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>Lendo informa\u00e7\u00f5es de an\u00e1lise GHK-Cu ou KPV<\/h2>\n<p>Para GHK-Cu ou KPV, pergunte quais registros de an\u00e1lise est\u00e3o dispon\u00edveis e como o sinal alvo foi identificado. Se um valor de pureza for fornecido, leia-o com seu m\u00e9todo e gr\u00e1fico completo.<\/p>\n<p><a href=\"https:\/\/nhdbio.com\/pt-br\/produtos\/ghk-cu\/\">GHK-Cu<\/a> \/ <a href=\"https:\/\/nhdbio.com\/pt-br\/produtos\/kpv\/\">KPV<\/a><\/p>\n<p><a href=\"https:\/\/nhdbio.com\/pt-br\/citacao\/\">Discuta requisitos de material e documentos com NHD<\/a> \u00b7 <a href=\"https:\/\/nhdbio.com\/pt-br\/metodos-analiticos\/interpretacao-de-cromatogramas\/\">Continue com o guia anal\u00edtico<\/a><\/p>\n<footer><strong>Fontes e notas de exemplo<\/strong><\/p>\n<p>Os n\u00fameros e as curvas s\u00e3o exemplos did\u00e1ticos, n\u00e3o resultados de testes de lotes de produtos. Fontes verificadas em 11 de outubro de 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>Escrita assistida por IA e revis\u00e3o de fontes. Materiais de cat\u00e1logo s\u00e3o para pesquisa, desenvolvimento e fabrica\u00e7\u00e3o, n\u00e3o para uso humano ou veterin\u00e1rio.<\/p>\n<\/footer>","protected":false},"excerpt":{"rendered":"<p>Aprenda por que o formato do pico importa antes de voc\u00ea ler uma porcentagem de pureza.<\/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\/pt-br\/exemplo-de-resolucao-de-picos-sobrepostos-em-hplc-de-peptideos\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\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\/pt-br\/exemplo-de-resolucao-de-picos-sobrepostos-em-hplc-de-peptideos\/\" \/>\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=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"NHD Technical Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\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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