{"id":4067,"date":"2026-10-11T06:33:31","date_gmt":"2026-10-11T06:33:31","guid":{"rendered":"https:\/\/nhdbio.com\/?page_id=4067"},"modified":"2026-10-15T03:21:40","modified_gmt":"2026-10-15T03:21:40","slug":"concentracao-em-massa-versus-molaridade","status":"publish","type":"page","link":"https:\/\/nhdbio.com\/pt-br\/analytical-methods\/mass-concentration-versus-molarity\/","title":{"rendered":"mg\/mL vs \u00b5M: duas formas de descrever a mesma solu\u00e7\u00e3o de pept\u00eddeo"},"content":{"rendered":"<p>Is 1 mg\/mL stronger than 500 \u00b5M? You cannot tell from those two numbers alone. They describe concentration in different ways. With the peptide\u2019s molecular weight, you can put both values into the same unit.<\/p>\n<h2>Leia mg\/mL como peso por volume<\/h2>\n<p>Uma concentra\u00e7\u00e3o de 1 mg\/mL significa que um mililitro de solu\u00e7\u00e3o cont\u00e9m 1 mg do material que est\u00e1 sendo contado. Nessa concentra\u00e7\u00e3o, 2 mL cont\u00e9m 2 mg e 10 mL cont\u00e9m 10 mg.<\/p>\n<p>Seja espec\u00edfico sobre o material: \u00e9 p\u00f3 pesado ou uma quantidade medida do pept\u00eddeo alvo?<\/p>\n<h2>Read \u00b5M as molecular amount per volume<\/h2>\n<p>\u00b5M means micromolar: micromoles per litre. It is useful when comparing amounts of molecules. At the same mg\/mL, smaller molecules give more molecules per volume than larger ones.<\/p>\n<p>Pense em dois sacos de contas com o mesmo peso. Um saco de contas menores pode conter mais contas individuais.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t02\/en\/1.png\" alt=\"Figura 1. A mesma massa de p\u00f3 pode conter diferentes contagens de mol\u00e9culas.\"><figcaption>Figura 1. Peso igual nem sempre significa n\u00fameros iguais de mol\u00e9culas.<\/figcaption><\/figure>\n<h2>Convert 1 mg\/mL into \u00b5M<\/h2>\n<p>Take an example peptide with a molecular weight of 2,000 g\/mol. First, 1 mg\/mL is the same as 1 g\/L. Divide by 2,000 to get 0.0005 mol\/L, then convert to micromolar: 500 \u00b5M.<\/p>\n<p class=\"formula\">\u00b5M = mg\/mL \u00d7 1,000,000 \u00f7 molecular weight (g\/mol)<\/p>\n<p>Nada no frasco mudou. Voc\u00ea descreveu a mesma concentra\u00e7\u00e3o usando uma unidade diferente.<\/p>\n<h2>Tente uma segunda massa molecular<\/h2>\n<p>At 1,000 g\/mol, the same 1 mg\/mL becomes 1,000 \u00b5M. At 2,000 g\/mol, it was 500 \u00b5M. The first solution has twice as many molecules per volume, even though the weight concentrations match.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t02\/en\/2.png\" alt=\"Figure 2. At 1 mg\/mL, hypothetical molar masses of 1,000 and 2,000 g\/mol give 1,000 and 500 \u00b5M.\"><figcaption>Figure 2. At 1 mg\/mL, the example molecular weights give 1,000 \u00b5M and 500 \u00b5M.<\/figcaption><\/figure>\n<div class=\"exercise\"><strong>Qual \u00e9 0.2 mg\/mL a uma massa molecular de 4,000 g\/mol?<\/strong><\/p>\n<details>\n<summary>Ver a resposta<\/summary>\n<p>0.2 \u00d7 1,000,000 \u00f7 4,000 = 50 \u00b5M.<\/p>\n<\/details>\n<\/div>\n<h2>Mantenha a concentra\u00e7\u00e3o separada da quantidade total<\/h2>\n<p>Two tubes at 250 \u00b5M can have different total amounts if one holds 1 mL and the other holds 10 mL. Concentration says how much is present per volume; total amount also needs the volume.<\/p>\n<p>A convers\u00e3o tamb\u00e9m n\u00e3o pode dizer se o pept\u00eddeo se dissolveu completamente ou permaneceu intacto. Essas s\u00e3o verifica\u00e7\u00f5es separadas.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t02\/en\/3.png\" alt=\"Figura 3. Converter a concentra\u00e7\u00e3o n\u00e3o estabelece o conte\u00fado de alvo dissolvido.\"><figcaption>Figura 3. Uma concentra\u00e7\u00e3o calculada e uma concentra\u00e7\u00e3o medida da solu\u00e7\u00e3o podem diferir.<\/figcaption><\/figure>\n<h2>Comparando concentra\u00e7\u00f5es de KPV ou LL-37<\/h2>\n<p>Para KPV ou LL-37, registre a unidade de concentra\u00e7\u00e3o e a forma exata do produto em conjunto. Se voc\u00ea estiver comparando um artigo de pesquisa com um registro de produto, primeiro converta ambos para a mesma unidade usando a massa molecular correta.<\/p>\n<p><a href=\"https:\/\/nhdbio.com\/pt-br\/produtos\/ll-37\/\">LL-37<\/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\/teor-de-peptideos-versus-pureza\/\">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.bachem.com\/knowledge-center\/quality-control-of-amino-acids-peptides-a-guide\/\">Bachem \u00b7 peptide quality control<\/a><\/li>\n<li><a href=\"https:\/\/www.sigmaaldrich.com\/US\/en\/support\/calculators-and-apps\/solution-dilution-calculator\">Sigma-Aldrich \u00b7 solution dilution calculator<\/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>Veja o que cada unidade de concentra\u00e7\u00e3o conta e depois converta entre mg\/mL e \u00b5M.<\/p>","protected":false},"author":1,"featured_media":0,"parent":865,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4067","page","type-page","status-publish","hentry"],"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>mg\/mL vs \u00b5M: Two Ways to Describe the Same Peptide Solution | NHD<\/title>\n<meta name=\"description\" content=\"See what each concentration unit counts, then convert between mg\/mL and \u00b5M.\" \/>\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\/metodos-analiticos\/concentracao-em-massa-versus-molaridade\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"mg\/mL vs \u00b5M: Two Ways to Describe the Same Peptide Solution\" \/>\n<meta property=\"og:description\" content=\"See what each concentration unit counts, then convert between mg\/mL and \u00b5M.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nhdbio.com\/pt-br\/metodos-analiticos\/concentracao-em-massa-versus-molaridade\/\" \/>\n<meta property=\"og:site_name\" content=\"NHD\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-15T03:21:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t02\/en\/1.png\" \/>\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=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/\",\"name\":\"mg\\\/mL vs \u00b5M: Two Ways to Describe the Same Peptide Solution | NHD\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t02\\\/en\\\/1.png\",\"datePublished\":\"2026-10-11T06:33:31+00:00\",\"dateModified\":\"2026-10-15T03:21:40+00:00\",\"description\":\"See what each concentration unit counts, then convert between mg\\\/mL and \u00b5M.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/#breadcrumb\"},\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/#primaryimage\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t02\\\/en\\\/1.png\",\"contentUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t02\\\/en\\\/1.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/mass-concentration-versus-molarity\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/nhdbio.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Analytical Methods &#038; 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