{"id":372604,"date":"2024-10-20T02:30:06","date_gmt":"2024-10-20T02:30:06","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-21-30415497-dc\/"},"modified":"2024-10-26T04:21:59","modified_gmt":"2024-10-26T04:21:59","slug":"bsi-21-30415497-dc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-21-30415497-dc\/","title":{"rendered":"BSI 21\/30415497 DC"},"content":{"rendered":"<p>This part of <span class=\"std\"><span class=\"std-ref\">ISO&nbsp;21438<\/span><\/span> 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 <span class=\"std\"><span class=\"std-ref\">ISO&nbsp;7708<\/span><\/span> and to static (area) sampling.<\/p>\n<p>The method is not applicable 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 air.<\/p>\n<p>The procedure does not differentiate between phosphoric acid and diphosphorus pentoxide (phosphoric anhydride) if both are present in the workplace.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>BS ISO 21438-1. Workplace atmospheres. Determination of inorganic acids by ion chromatography &#8211; Part 1. Non-volatile acids (sulfuric acid and phosphoric acid)<\/b><\/p>\n<table class=\"shortdes-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\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2021<\/td>\n<td>29<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":372613,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[204,2641],"product_tag":[],"class_list":{"0":"post-372604","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-040-30","7":"product_cat-bsi","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\/372604","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\/372613"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=372604"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=372604"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=372604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}