{"id":605491,"date":"2024-11-05T22:28:26","date_gmt":"2024-11-05T22:28:26","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-21438-12022\/"},"modified":"2024-11-05T22:28:26","modified_gmt":"2024-11-05T22:28:26","slug":"iso-21438-12022","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-21438-12022\/","title":{"rendered":"ISO 21438-1:2022"},"content":{"rendered":"<p>This document specifies a method for the determination of the time-weighted average mass concentration of sulfuric acid and phosphoric acid in workplace air by ion chromatography. The anions are detected by conductivity.<\/p>\n<p>The method is applicable to the personal sampling of airborne particles, as defined in ISO\u00a07708, and to static (area) sampling.<\/p>\n<p>The method does not apply to the determination of sulfur trioxide.<\/p>\n<p>The procedure does not differentiate between the acids and their corresponding salts if both are present in the workplace air.<\/p>\n<p>The procedure does not differentiate between phosphoric acid and diphosphorus pentoxide (phosphoric anhydride) if both are present in the workplace air.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Workplace atmospheres \u2014 Determination of inorganic acids by ion chromatography \u2014 Part 1: Non-volatile acids (sulfuric acid and phosphoric acid)<\/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>2022-05<\/td>\n<td>30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":605502,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[204,2634],"product_tag":[],"class_list":{"0":"post-605491","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-040-30","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\/605491","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\/605502"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=605491"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=605491"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=605491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}