{"id":643523,"date":"2024-11-06T01:33:48","date_gmt":"2024-11-06T01:33:48","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-ts-239732020\/"},"modified":"2024-11-06T01:33:48","modified_gmt":"2024-11-06T01:33:48","slug":"iso-ts-239732020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-ts-239732020\/","title":{"rendered":"ISO\/TS 23973:2020"},"content":{"rendered":"<p>This document establishes a valid method for separation of chemically heterogeneous polyethylene oxide (PEO) mixtures and for the determination the number and content of the chemically heterogeneous species in the overall sample.<\/p>\n<p>The method presented in this document serves as a technical guideline and enables laboratories to learn the principle of &#034;critical chromatography&#034; on a validated system.<\/p>\n<p>This method presented in this document with its stated system parameters is not applicable for other polymer classes, due to the diversity of the interactions between the polymer\/mobile phase\/stationary phase and the number of separation systems that are therefore available.<\/p>\n<p>The evaluation of the interlaboratory testing has shown that many error sources relate to the technique of liquid chromatography in general. Possible error sources are described in Annex A.<\/p>\n<p>Details on the evaluation of the interlaboratory testing are given in Annex B.<\/p>\n<p>Elugrams of the participants (excerpts) are given in Annex C.<\/p>\n<p>Investigations of the long-term stability of the test mixture are given in Annex D.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Liquid chromatography at critical conditions (LCCC) \u2014 Chemical heterogeneity of polyethylene oxides<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/iso\/\"><b>ISO<\/b><\/a><\/td>\n<td>2020-08<\/td>\n<td>56<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":643539,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1001,2634],"product_tag":[],"class_list":{"0":"post-643523","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-71-040-50","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/643523","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/643539"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=643523"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=643523"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=643523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}