{"id":71750,"date":"2025-12-05T18:48:50","date_gmt":"2025-12-05T18:48:50","guid":{"rendered":"https:\/\/discover.restek.com\/?p=71750"},"modified":"2026-04-13T20:13:15","modified_gmt":"2026-04-13T20:13:15","slug":"why-are-my-pfas-standards-shipped-in-glass-ampuls","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/zh-hans\/faq-it\/gnot5432\/why-are-my-pfas-standards-shipped-in-glass-ampuls","title":{"rendered":"Why are my PFAS standards shipped in glass ampuls when it\u2019s suggested to store and analyze PFAS in polypropylene vials?"},"content":{"rendered":"\n<p>Adsorption of PFAS onto the surface of storage containers is a <a href=\"https:\/\/doi.org\/10.1021\/acsmeasuresciau.3c00027\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/doi.org\/10.1021\/acsmeasuresciau.3c00027\" rel=\"noreferrer noopener\">well-documented issue<\/a>. During development of our PFAS standards, we observed similar adsorption issues. The extent of adsorption is likely dependent on a few factors:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polarity of the solvent with higher aqueous content resulting in more adsorption<\/li>\n\n\n\n<li>Type of end group (i.e., carboxylic acids adsorb differently than sulfonates)<\/li>\n\n\n\n<li>Chain-length of analyte with longer chain analytes adsorbing more strongly<\/li>\n\n\n\n<li>Material of container<\/li>\n\n\n\n<li>Surface area of the container<\/li>\n<\/ul>\n\n\n\n<p>Adsorption onto a glass or polypropylene vial at higher concentrations (&gt;1 ppm) are negligible in comparison to the concentration of the standard. As analyte concentrations decrease and solvent polarity increases (for example, during field sampling or analysis), adsorption effects become more pronounced; therefore, the use of polypropylene vials is recommended (vial <a href=\"https:\/\/www.restek.com\/p\/23243\" target=\"_blank\" rel=\"noopener\">cat.# 23243<\/a>, cap <a href=\"https:\/\/www.restek.com\/p\/23244\" target=\"_blank\" rel=\"noopener\">cat.# 23244<\/a>).<\/p>\n\n\n\n<p>For more information, we recommend reviewing our <a href=\"https:\/\/discover.restek.com\/wp-content\/uploads\/PFAS-Feasibility-Determination-of-Glass-Deactivation-and-Stabilizer-Concentration.pptx\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/wp-content\/uploads\/PFAS-Feasibility-Determination-of-Glass-Deactivation-and-Stabilizer-Concentration.pptx\">PFAS Feasibility: Determination of Glass Deactivation and Stabilizer Concentration<\/a> \u200bposter.<\/p>\n\n\n\n<div class=\"wp-block-group hub-fullwidth-container\"><div 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During development of our PFAS standards, we observed similar adsorption issues. The extent of adsorption is likely dependent on a few factors: Adsorption onto a glass or polypropylene vial at higher concentrations (&gt;1 ppm) are negligible in comparison to the concentration of&#8230;<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[803],"tags":[2674,2782],"industries-application":[2257],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[],"hf_cat_post":[],"ppma_author":[414],"class_list":["post-71750","post","type-post","status-publish","format-standard","hentry","category-faq-it","tag-faq-pfas-standards","tag-pfas","industries-application-analisi-dei-pfas"],"acf":[],"taxonomy_info":{"category":[{"value":803,"label":"FAQ"}],"post_tag":[{"value":2674,"label":"FAQ: PFAS Standards"},{"value":2782,"label":"PFAS"}],"industries-application":[{"value":2257,"label":"Analisi dei PFAS"}]},"featured_image_src_large":false,"author_info":{"display_name":"Restek Corporation","author_link":"https:\/\/discover.restek.com\/zh-hans\/author\/restek-corporation\/"},"comment_info":0,"category_info":[{"term_id":803,"name":"FAQ","slug":"faq-it","term_group":0,"term_taxonomy_id":803,"taxonomy":"category","description":"","parent":0,"count":271,"filter":"raw","cat_ID":803,"category_count":271,"category_description":"","cat_name":"FAQ","category_nicename":"faq-it","category_parent":0}],"tag_info":[{"term_id":2674,"name":"FAQ: PFAS Standards","slug":"faq-pfas-standards","term_group":0,"term_taxonomy_id":2674,"taxonomy":"post_tag","description":"Browse frequently asked questions for Restek PFAS reference standards.","parent":0,"count":7,"filter":"raw"},{"term_id":2782,"name":"PFAS","slug":"pfas","term_group":0,"term_taxonomy_id":2782,"taxonomy":"post_tag","description":"","parent":0,"count":113,"filter":"raw"}],"authors":[{"term_id":414,"user_id":11,"is_guest":0,"slug":"restek-corporation","display_name":"Restek Corporation","avatar_url":{"url":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg","url2x":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/71750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=71750"}],"version-history":[{"count":42,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/71750\/revisions"}],"predecessor-version":[{"id":92755,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/posts\/71750\/revisions\/92755"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=71750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=71750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=71750"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/industries-application?post=71750"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/post-badge?post=71750"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/resource-type?post=71750"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/product-library?post=71750"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/resource-technique?post=71750"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/hf_cat_post?post=71750"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/zh-hans\/wp-json\/wp\/v2\/ppma_author?post=71750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}