{"id":2681,"date":"2026-09-26T04:28:58","date_gmt":"2026-09-26T04:28:58","guid":{"rendered":"https:\/\/nhdbio.com\/peptide-vial-material-one-versus-fourteen-unstable-sequences\/"},"modified":"2026-10-01T14:30:45","modified_gmt":"2026-10-01T14:30:45","slug":"%e3%83%9a%e3%83%97%e3%83%81%e3%83%89%e3%83%90%e3%82%a4%e3%82%a2%e3%83%ab%e3%81%ae%e6%9d%90%e8%b3%aa%e3%80%8c1%e3%80%8d%e3%81%a8%e3%80%8c14%e3%80%8d%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e4%b8%8d","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/ja\/peptide-vial-material-one-versus-fourteen-unstable-sequences\/","title":{"rendered":"\u30da\u30d7\u30c1\u30c9\u30d0\u30a4\u30a2\u30eb\u306e\u6750\u6599\uff1a\u4e0d\u5b89\u5b9a\u306a\u914d\u5217\u304c1\u3064\u3001\u304a\u3088\u307313\uff5e14\u306e\u914d\u5217"},"content":{"rendered":"<p>A multi-peptide assay found a large difference between polypropylene and two glass vial types.<\/p>\n<h2>\u3053\u306e\u7814\u7a76\u3067\u5b9f\u969b\u306b\u691c\u8a3c\u3055\u308c\u305f\u3053\u3068<\/h2>\n<p>A published guidance study on peptides used in mass-spectrometry assays compared recovery after storage in polypropylene, ordinary glass, and deactivated glass vials. The experiment used a 50 fmol\/\u00b5L sample and 15 repeated LC\u2013MS\/MS analyses at hourly intervals over 15 hours. The authors classified signal decay of less than 5%, 5\u201350%, and more than 50% as stable, slow decay, and fast decay, respectively. The counts below describe peptides classified as unstable in that panel. This is a comparison of the full sample-handling system, not a chemical purity comparison of three peptide lots.<\/p>\n<h2>\u6587\u8108\u3092\u8e0f\u307e\u3048\u3066\u8aad\u3080\u4fa1\u5024\u306e\u3042\u308b\u6570\u5b57<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u7814\u7a76\u624b\u6cd5<\/th>\n<th>\u5831\u544a\u3055\u308c\u305f\u7d50\u679c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Polypropylene<\/td>\n<td>1 unstable peptide<\/td>\n<\/tr>\n<tr>\n<td>Ordinary glass<\/td>\n<td>13 unstable peptides<\/td>\n<\/tr>\n<tr>\n<td>Deactivated glass<\/td>\n<td>14 unstable peptides<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The counts make the practical point: even a vial marketed for analytical use can change which peptides remain measurable. In the same paper, two hydrophobic example sequences were highlighted in the handling analysis. Adsorption and recovery are sequence and condition dependent, so the observed one-versus-13\/14 result cannot be turned into a rule that all polypropylene vials are suitable or all glass vials fail.<\/p>\n<h2>\u898b\u7a4d\u4f9d\u983c\u66f8\uff08RFQ\uff09\u3084\u5b9f\u9a13\u8a08\u753b\u66f8\u306b\u8a18\u8f09\u3059\u3079\u304d\u5185\u5bb9<\/h2>\n<p>When requesting material for a low-concentration LC\u2013MS assay, identify the planned vial and tube materials, stock concentration, diluent, hold time, and transfer steps. Ask the analytical team to compare a fresh standard against a stored and transferred standard in the actual container. Record whether any internal standard was added before or after the potential loss point; a late-added standard may miss an earlier adsorption loss.<\/p>\n<h2>\u8a3c\u62e0\u306e\u5883\u754c\u7dda<\/h2>\n<p>The figures are counts in the published test panel, not percentage losses, and they are not NHD product measurements. They support method qualification under the buyer\u2019s own conditions.<\/p>\n<h2>\u60c5\u5831\u6e90\u3068\u4eca\u5f8c\u306e\u5bfe\u5fdc<\/h2>\n<p>\u4e00\u6b21\u8abf\u67fb\uff1a <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4830481\/\">\u8cea\u91cf\u5206\u6790\u6cd5\u306b\u57fa\u3065\u304f\u30a2\u30c3\u30bb\u30a4\u306b\u4f7f\u7528\u3055\u308c\u308b\u30da\u30d7\u30c1\u30c9\u306e\u751f\u6210\u3001\u5b9a\u91cf\u3001\u4fdd\u5b58\u304a\u3088\u3073\u53d6\u308a\u6271\u3044\u306b\u95a2\u3059\u308b\u63a8\u5968\u4e8b\u9805<\/a>. \u3053\u308c\u3089\u306e\u5916\u90e8\u30c7\u30fc\u30bf\u306f\u3001NHD\u30ed\u30c3\u30c8\u306e\u8a66\u9a13\u7d50\u679c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<p>\u95a2\u9023\u3059\u308bNHD\u30ac\u30a4\u30c9\uff1a <a href=\"https:\/\/nhdbio.com\/ja\/%e3%83%9a%e3%83%97%e3%83%81%e3%83%89%e3%81%ae%e6%90%8d%e5%a4%b1%e3%80%81%e3%83%81%e3%83%a5%e3%83%bc%e3%83%96%e3%80%81%e3%83%90%e3%82%a4%e3%82%a2%e3%83%ab%e3%80%81%e5%90%b8%e7%9d%80%e3%80%81%e5%b8%8c\/\">\u95a2\u9023\u8a18\u4e8b\u3092\u8aad\u3080<\/a>. \u6750\u6599\u306b\u95a2\u3059\u308b\u5177\u4f53\u7684\u306a\u8cea\u554f\u306b\u3064\u3044\u3066\u306f\u3001, <a href=\"https:\/\/nhdbio.com\/ja\/%e5%bc%95%e7%94%a8\/\">\u66f8\u9762\u306b\u3088\u308b\u898b\u7a4d\u3082\u308a\u306e\u4f9d\u983c<\/a> \u305d\u306e\u9806\u5e8f\u3001\u91d1\u984d\u3001\u4f7f\u7528\u76ee\u7684\u3001\u304a\u3088\u3073\u5fc5\u8981\u306a\u8a18\u9332\u306b\u3064\u3044\u3066\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>A multi-peptide assay found a large difference between polypropylene and two glass vial types.<\/p>","protected":false},"author":1,"featured_media":2746,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"","pim_article_type":"Primary-literature evidence note","pim_evidence_level":"External laboratory or process evidence; not clinical or NHD lot validation","pim_reviewer":"AI-assisted source cross-check (not independent expert peer review)","pim_reviewed_date":"2026-09-28","pim_editorial_note":"The figures are counts in the published test panel, not percentage losses, and they are not NHD product measurements. They support method qualification under the buyer\u2019s own conditions.","pim_review_status":"reviewed","pim_review_reason":"","pim_creation_method":"AI-assisted writing and source verification. Numerical claims were checked against the linked full-text records, with source inconsistencies identified in the article. This is not independent scientific peer review or verification of a supplied lot.","pim_sources":"[{\"title\":\"Recommendations for the generation, quantification, storage and handling of peptides used for mass spectrometry-based assays\",\"url\":\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4830481\/\",\"note\":\"\"}]","footnotes":""},"categories":[19],"tags":[],"class_list":["post-2681","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-published-study-cases"],"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>Peptide Vial Material: One Unstable Sequence Versus 13\u201314 - NHD<\/title>\n<meta name=\"description\" content=\"A multi-peptide assay found a large difference between polypropylene and two glass vial types. 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