{"id":4128,"date":"2026-10-11T06:38:25","date_gmt":"2026-10-11T06:38:25","guid":{"rendered":"https:\/\/nhdbio.com\/?page_id=4128"},"modified":"2026-10-11T07:41:51","modified_gmt":"2026-10-11T07:41:51","slug":"exemple-concret-de-ppm-de-solvant-residuel","status":"publish","type":"page","link":"https:\/\/nhdbio.com\/fr\/analytical-methods\/residual-solvent-ppm-worked-example\/","title":{"rendered":"Solvant r\u00e9siduel ppm : convertissez le rapport en masse r\u00e9elle"},"content":{"rendered":"<p>Un rapport indique 100 ppm d'un solvant. Combien cela repr\u00e9sente-t-il dans un \u00e9chantillon de poudre de 10 mg ? V\u00e9rifiez d'abord que les ppm sont exprim\u00e9s en poids. Ensuite, la conversion ne prend que deux \u00e9tapes.<\/p>\n<h2>Que comptent les ppm ?<\/h2>\n<p>For a weight-based result, 100 ppm means 100 parts solvent per one million parts sample by weight. One ppm by weight equals 1 \u00b5g\/g, or 1 mg\/kg.<\/p>\n<p>La m\u00eame abr\u00e9viation peut avoir une base diff\u00e9rente dans un autre contexte. V\u00e9rifiez le nom du solvant, le type d'\u00e9chantillon et la m\u00e9thode avant de convertir.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t19\/en\/1.png\" alt=\"Figure 1. Les ppm sur base massique signifient une fraction massique multipli\u00e9e par un million.\"><figcaption>Figure 1. Les ppm en poids d\u00e9crivent un rapport de masse.<\/figcaption><\/figure>\n<h2>Convertir 100 ppm dans un \u00e9chantillon de 10 mg<\/h2>\n<p>First convert 10 mg to 0.010 g. The result is 100 \u00b5g solvent per gram of sample. Multiply: 100 \u00d7 0.010 = 1 \u00b5g solvent, or 0.001 mg.<\/p>\n<p>A shortcut is solvent \u00b5g = ppm by weight \u00d7 sample mg \u00f7 1,000. Forgetting the mg-to-g conversion gives an answer a thousand times too large.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t19\/en\/2.png\" alt=\"Figure 2. 100 ppm w\/w in 10 mg powder corresponds to 1 \u00b5g of the stated solvent.\"><figcaption>Figure 2. 100 ppm by weight in 10 mg corresponds to 1 \u00b5g solvent.<\/figcaption><\/figure>\n<h2>Gardez le signe inf\u00e9rieur \u00e0<\/h2>\n<p>If the result is less than 100 ppm, the same 10 mg sample contains less than 1 \u00b5g of that solvent on this basis. It is an upper-bound statement, not an exact measurement of 1 \u00b5g.<\/p>\n<p>Demandez comment la limite de rapport a \u00e9t\u00e9 \u00e9tablie si cette limite sup\u00e9rieure est importante pour votre \u00e9tude.<\/p>\n<h2>Pour calculer la concentration d'une solution, il faut le volume<\/h2>\n<p>Suppose all of the example 1 \u00b5g transfers into a final 2 mL solution without loss. The solvent concentration is then 1 \u00f7 2 = 0.5 \u00b5g\/mL.<\/p>\n<p>Sans le volume final et les hypoth\u00e8ses de transfert, les ppm de poudre ne peuvent pas simplement devenir une concentration de solution. Les ppm ne sont pas toujours interchangeables avec mg\/L.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t19\/en\/3.png\" alt=\"Figure 3. Les ppm massiques, la concentration en solution et une limite de m\u00e9thode sont des entr\u00e9es diff\u00e9rentes.\"><figcaption>Figure 3. Les ppm de poudre et la concentration de solution n\u00e9cessitent des informations diff\u00e9rentes.<\/figcaption><\/figure>\n<h2>Calculez d'abord, puis \u00e9valuez l'exigence de recherche<\/h2>\n<p>La pertinence d\u00e9pend du solvant, du mat\u00e9riau, de la m\u00e9thode et de l'usage de recherche nomm\u00e9s. Une quantit\u00e9 calcul\u00e9e seule n'\u00e9tablit pas un niveau acceptable universel.<\/p>\n<div class=\"exercise\"><strong>Une poudre de 20 mg contient 250 ppm en masse. \u00c0 combien de solvant cela correspond-il ?<\/strong><\/p>\n<details>\n<summary>Voir la r\u00e9ponse<\/summary>\n<p>250 \u00d7 20 \u00f7 1,000 = 5 \u00b5g, or 0.005 mg.<\/p>\n<\/details>\n<\/div>\n<h2>Question sur les r\u00e9sultats de solvant pour GHK-Cu ou MOTS-c<\/h2>\n<p>Pour GHK-Cu ou MOTS-c, pr\u00e9cisez quel solvant vous \u00e9tudiez et confirmez si ce test a \u00e9t\u00e9 effectu\u00e9. Une d\u00e9claration de puret\u00e9 g\u00e9n\u00e9rale n'\u00e9tablit pas un r\u00e9sultat de solvant r\u00e9siduel.<\/p>\n<p><a href=\"https:\/\/nhdbio.com\/fr\/produits\/ghk-cu\/\">GHK-Cu<\/a> \/ <a href=\"https:\/\/nhdbio.com\/fr\/produits\/mots-c-humain\/\">MOTS-c<\/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\/comment-lire-une-fiche-technique-de-peptide\/\">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.bachem.com\/knowledge-center\/quality-control-of-amino-acids-peptides-a-guide\/\">Bachem \u00b7 peptide quality control<\/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>Lisez les ppm en masse, puis calculez le solvant dans un petit \u00e9chantillon de poudre.<\/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-4128","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>Residual Solvent ppm: Convert the Report into an Actual Mass | NHD<\/title>\n<meta name=\"description\" content=\"Read weight-based ppm, then calculate the solvent in a small powder sample.\" \/>\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\/methodes-danalyse\/exemple-concret-de-ppm-de-solvant-residuel\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Residual Solvent ppm: Convert the Report into an Actual Mass\" \/>\n<meta property=\"og:description\" content=\"Read weight-based ppm, then calculate the solvent in a small powder sample.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nhdbio.com\/fr\/methodes-danalyse\/exemple-concret-de-ppm-de-solvant-residuel\/\" \/>\n<meta property=\"og:site_name\" content=\"NHD\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-11T07:41:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t19\/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=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/\",\"name\":\"Residual Solvent ppm: Convert the Report into an Actual Mass | NHD\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t19\\\/en\\\/1.png\",\"datePublished\":\"2026-10-11T06:38:25+00:00\",\"dateModified\":\"2026-10-11T07:41:51+00:00\",\"description\":\"Read weight-based ppm, then calculate the solvent in a small powder sample.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/#primaryimage\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t19\\\/en\\\/1.png\",\"contentUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/plugins\\\/nhd-content-refresh\\\/teaching-images\\\/t19\\\/en\\\/1.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/analytical-methods\\\/residual-solvent-ppm-worked-example\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/nhdbio.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Analytical Methods &#038; 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