{"id":605493,"date":"2024-11-05T22:28:27","date_gmt":"2024-11-05T22:28:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-21438-22009\/"},"modified":"2024-11-05T22:28:27","modified_gmt":"2024-11-05T22:28:27","slug":"iso-21438-22009","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-21438-22009\/","title":{"rendered":"ISO 21438-2:2009"},"content":{"rendered":"<p>ISO 21438-2:2009 specifies a method for the determination of the time-weighted average mass concentration of hydrogen chloride (HCl) gas and hydrochloric acid mist, hydrogen bromide (HBr) vapour and hydrobromic acid mist and nitric acid (HNO<sub>3<\/sub>) vapour and mist in workplace air by collection on an alkali-impregnated quartz fibre filter and analysis by ion chromatography.<\/p>\n<p>For mist sampling, the method is applicable to the personal sampling of the inhalable fraction of airborne particles and to static (area) sampling.<\/p>\n<p>The analytical method is applicable to the determination of masses of 0,01 mg to 2,5 mg of HCl, HBr and HNO<sub>3<\/sub> per sample.<\/p>\n<p>The range of concentrations of HCl, HBr and HNO<sub>3<\/sub> in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 240-litre air sample, the working range is approximately 0,04 mg\/m<sup>3<\/sup> to 10 mg\/m<sup>3<\/sup> for HCl, HBr and HNO<sub>3<\/sub>.<\/p>\n<p>The procedure is intended to differentiate between the acids and their corresponding salts. If both are present in the air, particulate salts are trapped on a pre-filter. Co-sampled particulate matter trapped on the pre-filter and\/or deposited on the walls of the sampler may be analysed, if desired.<\/p>\n<p>Acids can react with co-sampled particulate matter on the pre-filter, causing interference with the measurement of the acid concentration.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Workplace atmospheres \u2014 Determination of inorganic acids by ion chromatography \u2014 Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric 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>2009-12<\/td>\n<td>36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":605506,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[204,2634],"product_tag":[],"class_list":{"0":"post-605493","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\/605493","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\/605506"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=605493"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=605493"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=605493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}