{"id":3117,"date":"2026-10-04T13:31:46","date_gmt":"2026-10-04T13:31:46","guid":{"rendered":"https:\/\/nhdbio.com\/?p=3117"},"modified":"2026-10-04T15:11:54","modified_gmt":"2026-10-04T15:11:54","slug":"%d8%a7%d9%84%d9%81%d8%b1%d9%82-%d8%a8%d9%8a%d9%86-%d8%a7%d9%84%d9%86%d9%82%d8%a7%d8%a1-%d8%a7%d9%84%d9%83%d9%8a%d9%85%d9%8a%d8%a7%d8%a6%d9%8a-%d9%88%d9%86%d8%b3%d8%a8%d8%a9-%d8%a7%d9%84%d8%a5%d8%ab","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/ar\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/","title":{"rendered":"\u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0627\u0644\u062b\u0642\u064a\u0644\u0629: \u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631 99% \u0644\u064a\u0633 \u0646\u0642\u0627\u0621\u064b \u0643\u064a\u0645\u064a\u0627\u0626\u064a\u064b\u0627 99%"},"content":{"rendered":"<p>\u0642\u062f \u062a\u062d\u062a\u0648\u064a \u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0628\u0628\u062a\u064a\u062f \u0627\u0644\u062b\u0642\u064a\u0644 \u0639\u0644\u0649 \u0639\u062f\u0629 \u0646\u0633\u0628 \u0645\u0626\u0648\u064a\u0629. \u0642\u062f \u062a\u0628\u062f\u0648 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0628\u0627\u062f\u0644\u060c \u0644\u0643\u0646\u0647\u0627 \u062a\u062c\u064a\u0628 \u0639\u0646 \u0623\u0633\u0626\u0644\u0629 \u0645\u062e\u062a\u0644\u0641\u0629. \u064a\u0635\u0641 \u0627\u0644\u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631\u064a \u0627\u0644\u0630\u0631\u0627\u062a \u0627\u0644\u0645\u0648\u0633\u0648\u0645\u0629\u061b \u0648\u062a\u0635\u0641 \u0627\u0644\u0646\u0642\u0627\u0621 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a \u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u0627\u062f\u0629 \u0648\u0641\u0642 \u0637\u0631\u064a\u0642\u0629 \u062a\u062d\u0644\u064a\u0644\u064a\u0629 \u0645\u062d\u062f\u062f\u0629.<\/p>\n<h2>\u0645\u062b\u0627\u0644 \u062d\u0642\u064a\u0642\u064a \u0645\u0646 \u0643\u062a\u0627\u0644\u0648\u062c \u064a\u0648\u0636\u062d \u0627\u0644\u0641\u0631\u0642<\/h2>\n<p>Sigma-Aldrich\u2019s catalogue entry for L-lysine-13C6,15N2 hydrochloride lists 99 atom % carbon-13 and 99 atom % nitrogen-15, alongside an assay of 95% (CP). This is a labelled amino-acid building block, not a finished peptide. Its separate specification fields make the distinction visible: high isotope enrichment is not a statement that the whole material has the same chemical purity.<\/p>\n<h2>\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u0646\u0628\u063a\u064a \u062a\u062d\u062f\u064a\u062f\u0647 \u0644\u0644\u0628\u0628\u062a\u064a\u062f \u0627\u0644\u062b\u0642\u064a\u0644 \u0627\u0644\u0646\u0647\u0627\u0626\u064a\u061f<\/h2>\n<p>\u0633\u062c\u0651\u0644 \u0623\u064a \u0628\u0642\u0627\u064a\u0627 \u062a\u062d\u0645\u0644 \u0627\u0644\u0648\u0633\u0645 \u0648\u0623\u064a \u0627\u0644\u0630\u0631\u0627\u062a \u062a\u064f\u0633\u062a\u0628\u062f\u0644 \u0628\u0627\u0644\u062a\u062d\u062f\u064a\u062f. \u062b\u0645 \u0627\u0630\u0643\u0631 \u0645\u062a\u0637\u0644\u0628 \u0627\u0644\u0646\u0642\u0627\u0621 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a \u0628\u0634\u0643\u0644 \u0645\u0646\u0641\u0635\u0644. \u0644\u0644\u0639\u0645\u0644 \u0627\u0644\u0643\u0645\u064a\u060c \u0627\u0633\u0623\u0644 \u0623\u064a\u0636\u064b\u0627 \u0643\u064a\u0641 \u064a\u064f\u0639\u064a\u064e\u0651\u0646 \u0645\u0642\u062f\u0627\u0631 \u0627\u0644\u0628\u0628\u062a\u064a\u062f \u0623\u0648 \u062a\u0631\u0643\u064a\u0632\u0647. \u0644\u0627 \u064a\u062b\u0628\u062a \u062a\u0633\u0644\u0633\u0644 \u0645\u0648\u0633\u0648\u0645 \u0648\u0631\u0642\u0645 \u0625\u062b\u0631\u0627\u0621 \u0646\u0638\u0627\u0626\u0631\u064a \u0648\u0646\u062a\u064a\u062c\u0629 \u0646\u0642\u0627\u0621 HPLC \u062a\u0644\u0642\u0627\u0626\u064a\u064b\u0627 \u0645\u0642\u062f\u0627\u0631\u064b\u0627 \u062f\u0642\u064a\u0642\u064b\u0627 \u0644\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062f\u0627\u062e\u0644\u064a.<\/p>\n<h2>\u0644\u0645\u0627\u0630\u0627 \u0642\u062f \u062a\u0643\u0648\u0646 \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u062e\u0641\u064a\u0641\u0629 \u0645\u0647\u0645\u0629<\/h2>\n<p>\u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u064a\u064f\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0645\u0639\u064a\u0627\u0631 \u0627\u0644\u062b\u0642\u064a\u0644 \u0625\u0644\u0649 \u062c\u0627\u0646\u0628 \u0647\u062f\u0641 \u063a\u064a\u0631 \u0645\u0648\u0633\u0648\u0645. \u0625\u0630\u0627 \u0648\u064f\u062c\u062f\u062a \u0645\u0627\u062f\u0629 \u062e\u0641\u064a\u0641\u0629 \u0641\u064a \u0627\u0644\u0645\u0639\u064a\u0627\u0631\u060c \u0641\u0642\u062f \u062a\u0624\u062b\u0631 \u0641\u064a \u0642\u064a\u0627\u0633 \u0627\u0644\u0642\u0646\u0627\u0629 \u0627\u0644\u062e\u0641\u064a\u0641\u0629. \u062a\u0639\u062a\u0645\u062f \u0623\u0647\u0645\u064a\u0629 \u0630\u0644\u0643 \u0639\u0644\u0649 \u0646\u0637\u0627\u0642 \u0627\u0644\u0641\u062d\u0635 \u0648\u0633\u064a\u0631 \u0627\u0644\u0639\u0645\u0644 \u0627\u0644\u062a\u062d\u0644\u064a\u0644\u064a. \u0627\u0633\u0623\u0644 \u0639\u0646 \u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u062a\u0644\u0648\u062b \u0627\u0644\u062e\u0641\u064a\u0641 \u0630\u064a \u0627\u0644\u0635\u0644\u0629 \u0628\u062f\u0644\u064b\u0627 \u0645\u0646 \u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0646\u0633\u0628\u0629 \u0627\u0644\u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631\u064a \u062a\u0633\u062a\u0628\u0639\u062f \u0643\u0644 \u062a\u062f\u0627\u062e\u0644.<\/p>\n<h2>\u062d\u0627\u0641\u0638 \u0639\u0644\u0649 \u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u062a\u0643\u0627\u0641\u0626\u0629<\/h2>\n<p>\u0639\u0646\u062f \u0645\u0642\u0627\u0631\u0646\u0629 \u0639\u0631\u0648\u0636 \u0627\u0644\u0623\u0633\u0639\u0627\u0631\u060c \u0627\u0633\u062a\u062e\u062f\u0645 \u0646\u0641\u0633 \u0627\u0644\u062a\u0633\u0644\u0633\u0644\u060c \u0648\u0627\u0644\u0645\u0648\u0636\u0639 \u0627\u0644\u0645\u0633\u0645\u0651\u0649\u060c \u0648\u0627\u0644\u0634\u0643\u0644 \u0627\u0644\u0637\u0631\u0641\u064a\u060c \u0648\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0646\u0642\u0627\u0621\u060c \u0648\u0623\u0633\u0627\u0633 \u0625\u0633\u0646\u0627\u062f \u0627\u0644\u0643\u0645\u064a\u0629. \u0627\u0633\u0623\u0644 \u0623\u064a \u0627\u0644\u0646\u062a\u0627\u0626\u062c \u0645\u0642\u0627\u0633\u0629 \u0639\u0644\u0649 \u0627\u0644\u0628\u0628\u062a\u064a\u062f \u0627\u0644\u0646\u0647\u0627\u0626\u064a \u0648\u0623\u064a\u0647\u0627 \u062a\u0635\u0641 \u0627\u0644\u0645\u0648\u0627\u062f \u0627\u0644\u0623\u0648\u0644\u064a\u0629. \u0623\u0631\u0642\u0627\u0645 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c \u0623\u0639\u0644\u0627\u0647 \u062a\u0634\u0631\u062d \u0627\u0644\u0645\u0635\u0637\u0644\u062d\u0627\u062a\u061b \u0648\u0647\u064a \u0644\u0627 \u062a\u0634\u0647\u062f \u0639\u0644\u0649 \u0645\u0627\u062f\u0629 NHD \u0648\u0644\u0627 \u062a\u062b\u0628\u062a \u062d\u062f \u0642\u0628\u0648\u0644 \u0639\u0627\u0644\u0645\u064a.<\/p>\n<h2>\u0627\u0644\u062e\u0637\u0648\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0645\u0639 NHD<\/h2>\n<p>\u062a\u062d\u062f\u062f \u0628\u0637\u0627\u0642\u0627\u062a \u0627\u0644\u0645\u0646\u062a\u062c\u0627\u062a \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629 \u0623\u062f\u0646\u0627\u0647 \u0639\u0627\u0626\u0644\u0627\u062a \u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0641\u064a \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c. \u0648\u0647\u064a \u0644\u0627 \u062a\u0624\u0643\u062f \u062a\u0648\u0641\u0631 \u0646\u0633\u062e \u0645\u0648\u0633\u0648\u0645\u0629 \u0628\u0627\u0644\u0628\u064a\u0648\u062a\u064a\u0646 \u0623\u0648 \u0641\u0644\u0648\u0631\u064a\u0629 \u0623\u0648 \u0645\u0648\u0633\u0648\u0645\u0629 \u0628\u0627\u0644\u0646\u0638\u0627\u0626\u0631 \u0623\u0648 \u0646\u0633\u062e \u0645\u0643\u062a\u0628\u0627\u062a. \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0645\u0627\u062f\u0629 \u0645\u0639\u062f\u0644\u0629\u060c \u062d\u062f\u062f \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u062f\u0642\u064a\u0642 \u0641\u064a \u0627\u0633\u062a\u0641\u0633\u0627\u0631 \u0645\u062e\u0635\u0635.<\/p>\n<p>\u0627\u0628\u062f\u0623 \u0628\u0640 <a href=\"https:\/\/nhdbio.com\/ar\/%d9%82%d8%a7%d8%a6%d9%85%d8%a9-%d9%85%d8%b1%d8%a7%d8%ac%d8%b9%d8%a9-%d9%84%d8%b7%d9%84%d8%a8-%d8%a7%d9%84%d8%a8%d8%a8%d8%aa%d9%8a%d8%af%d8%a7%d8%aa-%d8%a7%d9%84%d9%85%d9%88%d8%b3%d9%88%d9%85%d8%a9\/\">\u062f\u0644\u064a\u0644 \u0637\u0644\u0628 \u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0627\u0644\u062b\u0642\u064a\u0644\u0629<\/a>. \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0639\u0631\u0636 \u0633\u0639\u0631\u060c <a href=\"https:\/\/nhdbio.com\/ar\/%d8%a7%d9%82%d8%aa%d8%a8%d8%a7%d8%b3\/\">\u0623\u0631\u0633\u0644 NHD \u062a\u0633\u0644\u0633\u0644\u0643 \u0623\u0648 \u0627\u0633\u0645 \u0627\u0644\u0645\u0646\u062a\u062c \u0648\u0627\u0644\u0643\u0645\u064a\u0629 \u0648\u0627\u0644\u0645\u0633\u062a\u0646\u062f\u0627\u062a \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629<\/a>. \u0623\u0643\u062f \u0627\u0644\u0634\u0643\u0644 \u0627\u0644\u062f\u0642\u064a\u0642 \u0648\u0627\u0644\u062c\u062f\u0648\u0649 \u0648\u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0648\u0634\u0631\u0648\u0637 \u0627\u0644\u062a\u0633\u0644\u064a\u0645 \u0642\u0628\u0644 \u0627\u0644\u0637\u0644\u0628.<\/p>\n<h2>\u0645\u0635\u0627\u062f\u0631<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.sigmaaldrich.com\/US\/en\/product\/aldrich\/608041\">Sigma-Aldrich: \u062d\u0642\u0648\u0644 \u0645\u0646\u0641\u0635\u0644\u0629 \u0644\u0644\u0625\u062b\u0631\u0627\u0621 \u0648\u0627\u0644\u0645\u0642\u0627\u064a\u0633\u0629<\/a><\/li>\n<li><a href=\"https:\/\/www.jpt.com\/products-services\/peptide-modifications\/isotope-labeled-peptides\/\">JPT: \u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0645\u0648\u0633\u0648\u0645\u0629 \u0628\u0627\u0644\u0646\u0638\u0627\u0626\u0631<\/a><\/li>\n<\/ul>\n<p>\u0627\u0644\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0639\u0627\u0645\u0629 \u062a\u0634\u0631\u062d \u0627\u0644\u0645\u0648\u0636\u0648\u0639\u061b \u0648\u0647\u064a \u0644\u064a\u0633\u062a \u062f\u0644\u064a\u0644 \u062f\u0641\u0639\u0629 NHD. \u0645\u0648\u0627\u062f \u0627\u0644\u0628\u062d\u062b \u0645\u062e\u0635\u0635\u0629 \u0644\u0644\u0628\u062d\u062b \u0648\u0627\u0644\u062a\u0637\u0648\u064a\u0631 \u0648\u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0627\u0644\u0645\u062e\u062a\u0628\u0631\u064a\u060c \u0648\u0644\u064a\u0633 \u0644\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0628\u0634\u0631\u064a \u0623\u0648 \u0627\u0644\u0628\u064a\u0637\u0631\u064a.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0642\u062f \u062a\u062d\u062a\u0648\u064a \u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0628\u0628\u062a\u064a\u062f \u0627\u0644\u062b\u0642\u064a\u0644 \u0639\u0644\u0649 \u0639\u062f\u0629 \u0646\u0633\u0628 \u0645\u0626\u0648\u064a\u0629. \u0642\u062f \u062a\u0628\u062f\u0648 \u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0628\u0627\u062f\u0644\u060c \u0644\u0643\u0646\u0647\u0627 \u062a\u062c\u064a\u0628 \u0639\u0646 \u0623\u0633\u0626\u0644\u0629 \u0645\u062e\u062a\u0644\u0641\u0629. \u064a\u0635\u0641 \u0627\u0644\u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631\u064a \u0627\u0644\u0630\u0631\u0627\u062a \u0627\u0644\u0645\u0648\u0633\u0648\u0645\u0629\u061b \u0648\u062a\u0635\u0641 \u0627\u0644\u0646\u0642\u0627\u0621 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a \u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0645\u0627\u062f\u0629 \u0648\u0641\u0642 \u0637\u0631\u064a\u0642\u0629 \u062a\u062d\u0644\u064a\u0644\u064a\u0629 \u0645\u062d\u062f\u062f\u0629.<\/p>","protected":false},"author":1,"featured_media":3113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"344,369","pim_article_type":"Peptide buying and basics","pim_evidence_level":"Technical references and labeled calculations","pim_reviewer":"Codex AI editorial","pim_reviewed_date":"2026-10-04","pim_editorial_note":"Public data and labeled teaching calculations; not NHD batch results. Confirm project and document availability.","pim_review_status":"reviewed","pim_review_reason":"Source, arithmetic, identity and search-intent checks. No independent human technical review recorded.","pim_creation_method":"AI-assisted writing, source checks and illustrated cover.","pim_sources":"[{\"title\":\"Sigma-Aldrich: separate enrichment and assay fields\",\"url\":\"https:\/\/www.sigmaaldrich.com\/US\/en\/product\/aldrich\/608041\",\"note\":\"Public reference, not NHD batch evidence.\"},{\"title\":\"JPT: isotope-labelled peptides\",\"url\":\"https:\/\/www.jpt.com\/products-services\/peptide-modifications\/isotope-labeled-peptides\/\",\"note\":\"Public reference, not NHD batch evidence.\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-3117","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>Heavy peptides: 99% isotope enrichment is not 99% chemical purity - NHD<\/title>\n<meta name=\"description\" content=\"Peptide Raw Materials and Custom Peptide Synthesis\" \/>\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\/ar\/\u0627\u0644\u0641\u0631\u0642-\u0628\u064a\u0646-\u0627\u0644\u0646\u0642\u0627\u0621-\u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a-\u0648\u0646\u0633\u0628\u0629-\u0627\u0644\u0625\u062b\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Heavy peptides: 99% isotope enrichment is not 99% chemical purity\" \/>\n<meta property=\"og:description\" content=\"A heavy peptide specification may contain several percentages. They can look interchangeable, but they answer different questions. Isotope enrichment describes the labelled atoms; chemical purity describes the composition of the material under a stated analytical method.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nhdbio.com\/ar\/\u0627\u0644\u0641\u0631\u0642-\u0628\u064a\u0646-\u0627\u0644\u0646\u0642\u0627\u0621-\u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a-\u0648\u0646\u0633\u0628\u0629-\u0627\u0644\u0625\u062b\/\" \/>\n<meta property=\"og:site_name\" content=\"NHD\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-04T13:31:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-04T15:11:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\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=\"\u0643\u064f\u062a\u0628 \u0628\u0648\u0627\u0633\u0637\u0629\" \/>\n\t<meta name=\"twitter:data1\" content=\"NHD Technical Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u0648\u0642\u062a \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0645\u064f\u0642\u062f\u0651\u0631\" \/>\n\t<meta name=\"twitter:data2\" content=\"\u062f\u0642\u064a\u0642\u062a\u0627\u0646\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/\"},\"author\":{\"name\":\"NHD Technical Team\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/person\\\/0ffb0dec7fda0f720073fc468fac6fc1\"},\"headline\":\"Heavy peptides: 99% isotope enrichment is not 99% chemical purity\",\"datePublished\":\"2026-10-04T13:31:46+00:00\",\"dateModified\":\"2026-10-04T15:11:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/\"},\"wordCount\":385,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/isotope-purity-cover.png\",\"articleSection\":[\"Evidence &amp; Quality Guides\"],\"inLanguage\":\"ar\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/\",\"name\":\"Heavy peptides: 99% isotope enrichment is not 99% chemical purity - NHD\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/isotope-purity-cover.png\",\"datePublished\":\"2026-10-04T13:31:46+00:00\",\"dateModified\":\"2026-10-04T15:11:54+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#breadcrumb\"},\"inLanguage\":\"ar\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#primaryimage\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/isotope-purity-cover.png\",\"contentUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/isotope-purity-cover.png\",\"width\":1536,\"height\":1024,\"caption\":\"AI-generated educational illustration; not an NHD facility photograph or batch result.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/nhdbio.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Heavy peptides: 99% isotope enrichment is not 99% chemical purity\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#website\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/\",\"name\":\"NHD\",\"description\":\"Peptide Raw Materials and Custom Peptide Synthesis\",\"publisher\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/nhdbio.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ar\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#organization\",\"name\":\"NHD\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/codex-clipboard-354c928e-4b5b-482d-9261-02023d4c9680.png\",\"contentUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/codex-clipboard-354c928e-4b5b-482d-9261-02023d4c9680.png\",\"width\":2172,\"height\":724,\"caption\":\"NHD\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/person\\\/0ffb0dec7fda0f720073fc468fac6fc1\",\"name\":\"NHD Technical Team\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g\",\"caption\":\"NHD Technical Team\"},\"description\":\"NHD Technical Team maintains research-use catalog documentation and evidence summaries. Reviewed articles link to peer-reviewed papers, trial registries and regulatory records, retain null findings and study limitations, and distinguish published interventions from catalog materials. AI-assisted drafting may be used for structure; source links and evidence boundaries remain visible. This work is not independent peer review or medical advice.\",\"sameAs\":[\"https:\\\/\\\/nhdbio.com\"],\"url\":\"https:\\\/\\\/nhdbio.com\\\/ar\\\/author\\\/qianmiao-technical-team\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0627\u0644\u062b\u0642\u064a\u0644\u0629: \u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631 99% \u0644\u064a\u0633 \u0646\u0642\u0627\u0621\u064b \u0643\u064a\u0645\u064a\u0627\u0626\u064a\u064b\u0627 99% - NHD","description":"\u0645\u0648\u0627\u062f \u062e\u0627\u0645 \u0628\u0628\u062a\u064a\u062f\u064a\u0629 \u0648\u062a\u062e\u0644\u064a\u0642 \u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u062d\u0633\u0628 \u0627\u0644\u0637\u0644\u0628","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/nhdbio.com\/ar\/\u0627\u0644\u0641\u0631\u0642-\u0628\u064a\u0646-\u0627\u0644\u0646\u0642\u0627\u0621-\u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a-\u0648\u0646\u0633\u0628\u0629-\u0627\u0644\u0625\u062b\/","og_locale":"ar_AR","og_type":"article","og_title":"Heavy peptides: 99% isotope enrichment is not 99% chemical purity","og_description":"A heavy peptide specification may contain several percentages. They can look interchangeable, but they answer different questions. Isotope enrichment describes the labelled atoms; chemical purity describes the composition of the material under a stated analytical method.","og_url":"https:\/\/nhdbio.com\/ar\/\u0627\u0644\u0641\u0631\u0642-\u0628\u064a\u0646-\u0627\u0644\u0646\u0642\u0627\u0621-\u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a-\u0648\u0646\u0633\u0628\u0629-\u0627\u0644\u0625\u062b\/","og_site_name":"NHD","article_published_time":"2026-10-04T13:31:46+00:00","article_modified_time":"2026-10-04T15:11:54+00:00","og_image":[{"width":1536,"height":1024,"url":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png","type":"image\/png"}],"author":"NHD Technical Team","twitter_card":"summary_large_image","twitter_description":"Peptide Raw Materials and Custom Peptide Synthesis","twitter_misc":{"\u0643\u064f\u062a\u0628 \u0628\u0648\u0627\u0633\u0637\u0629":"NHD Technical Team","\u0648\u0642\u062a \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0645\u064f\u0642\u062f\u0651\u0631":"\u062f\u0642\u064a\u0642\u062a\u0627\u0646"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#article","isPartOf":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/"},"author":{"name":"NHD Technical Team","@id":"https:\/\/nhdbio.com\/#\/schema\/person\/0ffb0dec7fda0f720073fc468fac6fc1"},"headline":"Heavy peptides: 99% isotope enrichment is not 99% chemical purity","datePublished":"2026-10-04T13:31:46+00:00","dateModified":"2026-10-04T15:11:54+00:00","mainEntityOfPage":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/"},"wordCount":385,"commentCount":0,"publisher":{"@id":"https:\/\/nhdbio.com\/#organization"},"image":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#primaryimage"},"thumbnailUrl":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png","articleSection":["Evidence &amp; Quality Guides"],"inLanguage":"ar","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/","url":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/","name":"\u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u0627\u0644\u062b\u0642\u064a\u0644\u0629: \u0625\u062b\u0631\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0626\u0631 99% \u0644\u064a\u0633 \u0646\u0642\u0627\u0621\u064b \u0643\u064a\u0645\u064a\u0627\u0626\u064a\u064b\u0627 99% - NHD","isPartOf":{"@id":"https:\/\/nhdbio.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#primaryimage"},"image":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#primaryimage"},"thumbnailUrl":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png","datePublished":"2026-10-04T13:31:46+00:00","dateModified":"2026-10-04T15:11:54+00:00","breadcrumb":{"@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#breadcrumb"},"inLanguage":"ar","potentialAction":[{"@type":"ReadAction","target":["https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/"]}]},{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#primaryimage","url":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png","contentUrl":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/isotope-purity-cover.png","width":1536,"height":1024,"caption":"AI-generated educational illustration; not an NHD facility photograph or batch result."},{"@type":"BreadcrumbList","@id":"https:\/\/nhdbio.com\/heavy-peptide-isotopic-enrichment-chemical-purity-difference\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/nhdbio.com\/"},{"@type":"ListItem","position":2,"name":"Heavy peptides: 99% isotope enrichment is not 99% chemical purity"}]},{"@type":"WebSite","@id":"https:\/\/nhdbio.com\/#website","url":"https:\/\/nhdbio.com\/","name":"NHD","description":"\u0645\u0648\u0627\u062f \u062e\u0627\u0645 \u0628\u0628\u062a\u064a\u062f\u064a\u0629 \u0648\u062a\u062e\u0644\u064a\u0642 \u0627\u0644\u0628\u0628\u062a\u064a\u062f\u0627\u062a \u062d\u0633\u0628 \u0627\u0644\u0637\u0644\u0628","publisher":{"@id":"https:\/\/nhdbio.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/nhdbio.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ar"},{"@type":"Organization","@id":"https:\/\/nhdbio.com\/#organization","name":"NHD","url":"https:\/\/nhdbio.com\/","logo":{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/nhdbio.com\/#\/schema\/logo\/image\/","url":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/codex-clipboard-354c928e-4b5b-482d-9261-02023d4c9680.png","contentUrl":"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/09\/codex-clipboard-354c928e-4b5b-482d-9261-02023d4c9680.png","width":2172,"height":724,"caption":"NHD"},"image":{"@id":"https:\/\/nhdbio.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/nhdbio.com\/#\/schema\/person\/0ffb0dec7fda0f720073fc468fac6fc1","name":"\u0627\u0644\u0641\u0631\u064a\u0642 \u0627\u0644\u062a\u0642\u0646\u064a \u0641\u064a NHD","image":{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/secure.gravatar.com\/avatar\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8445618b3e2834fa0c7ae1a03a371ed002e9bf8d2cc1cd989dc4a71bb2b66110?s=96&d=mm&r=g","caption":"NHD Technical Team"},"description":"\u064a\u062d\u062a\u0641\u0638 \u0641\u0631\u064a\u0642 NHD \u0627\u0644\u0641\u0646\u064a \u0628\u0648\u062b\u0627\u0626\u0642 \u0643\u062a\u0627\u0644\u0648\u062c \u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0628\u062d\u062b\u064a \u0648\u0645\u0644\u062e\u0635\u0627\u062a \u0627\u0644\u0623\u062f\u0644\u0629. \u062a\u0631\u062a\u0628\u0637 \u0627\u0644\u0645\u0642\u0627\u0644\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u0645\u062a \u0645\u0631\u0627\u062c\u0639\u062a\u0647\u0627 \u0628\u0627\u0644\u0623\u0648\u0631\u0627\u0642 \u0627\u0644\u062a\u064a \u062a\u0645\u062a \u0645\u0631\u0627\u062c\u0639\u062a\u0647\u0627 \u0645\u0646 \u0642\u0628\u0644 \u0627\u0644\u0646\u0638\u0631\u0627\u0621\u060c \u0648\u0633\u062c\u0644\u0627\u062a \u0627\u0644\u062a\u062c\u0627\u0631\u0628 \u0648\u0627\u0644\u0633\u062c\u0644\u0627\u062a \u0627\u0644\u062a\u0646\u0638\u064a\u0645\u064a\u0629\u060c \u0648\u062a\u062d\u062a\u0641\u0638 \u0628\u0627\u0644\u0646\u062a\u0627\u0626\u062c \u0627\u0644\u0641\u0627\u0631\u063a\u0629 \u0648\u0642\u064a\u0648\u062f \u0627\u0644\u062f\u0631\u0627\u0633\u0629\u060c \u0648\u062a\u0645\u064a\u0632 \u0627\u0644\u062a\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u0645\u0646\u0634\u0648\u0631\u0629 \u0639\u0646 \u0645\u0648\u0627\u062f \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c. \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0635\u064a\u0627\u063a\u0629 \u0628\u0645\u0633\u0627\u0639\u062f\u0629 AI \u0644\u0644\u0647\u064a\u0643\u0644\u061b \u062a\u0638\u0644 \u0631\u0648\u0627\u0628\u0637 \u0627\u0644\u0645\u0635\u062f\u0631 \u0648\u062d\u062f\u0648\u062f \u0627\u0644\u0623\u062f\u0644\u0629 \u0645\u0631\u0626\u064a\u0629. \u0647\u0630\u0627 \u0627\u0644\u0639\u0645\u0644 \u0644\u064a\u0633 \u0645\u0631\u0627\u062c\u0639\u0629 \u0623\u0642\u0631\u0627\u0646 \u0645\u0633\u062a\u0642\u0644\u0629 \u0623\u0648 \u0646\u0635\u064a\u062d\u0629 \u0637\u0628\u064a\u0629.","sameAs":["https:\/\/nhdbio.com"],"url":"https:\/\/nhdbio.com\/ar\/author\/qianmiao-technical-team\/"}]}},"_links":{"self":[{"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/posts\/3117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/comments?post=3117"}],"version-history":[{"count":2,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/posts\/3117\/revisions"}],"predecessor-version":[{"id":3144,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/posts\/3117\/revisions\/3144"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/media\/3113"}],"wp:attachment":[{"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/media?parent=3117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/categories?post=3117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nhdbio.com\/ar\/wp-json\/wp\/v2\/tags?post=3117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}