{"id":493183,"date":"2024-11-05T12:41:58","date_gmt":"2024-11-05T12:41:58","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/as-2434-92000-r2013\/"},"modified":"2024-11-05T12:41:58","modified_gmt":"2024-11-05T12:41:58","slug":"as-2434-92000-r2013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/as\/as-2434-92000-r2013\/","title":{"rendered":"AS 2434.9:2000 (R2013)"},"content":{"rendered":"<p>Sets out a method for the determination by atomic absorption spectrometry of the concentrations of the acid-extractable ions sodium, magnesium, calcium and iron in coal. <\/p>\n<p> AS 2434.9\u20142000 <br \/> Methods for the analysis and testing of lower rank coal and its chars <br \/> Method 9: Determination of four acid-extractable inorganic ions in lower rank coal  <\/p>\n<p><b>Scope<\/b><\/p>\n<p> This Standard sets out a method for the determination by atomic absorption spectrometry of the concentrations of the acid-extractable ions sodium, magnesium, calcium and iron in coal. The method is applicable to any coal, but a meaningful interpretation of results can only be gained if the forms of the inorganics in the coal are known. <br \/> NOTES: <br \/> 1 The determination of acid-extractable aluminium is also possible by this method. Aluminium is found in most coals in various forms of clays, but can also be present in some coals in an acid-extractable form, thought to be best represented as Al(OH)n(3-n) . Aluminium in some clay types is partially soluble in acid. A detailed understanding of the mineral and inorganic constituents of the coal is necessary before acid-extractable aluminium determinations are performed. <br \/> These considerations apply also to the other inorganic ions, but to a lesser extent. <br \/> 2 An alternative procedure for measurement of the concentrations of the ions using inductively coupled plasma atomic emission spectrometry (ICP-AES) is acceptable if it can be demonstrated that the procedure has the same precision and accuracy as the atomic absorption technique used in this method.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Method for the analysis and testing of lower rank coal and its chars &#8211; Determination of four acid-extractable ions in lower rank coal<\/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\/as\/\"><b>AS<\/b><\/a><\/td>\n<td>2000-11-01<\/td>\n<td>13<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":493198,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1046,2633],"product_tag":[],"class_list":{"0":"post-493183","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-73-040","7":"product_cat-as","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\/493183","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\/493198"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=493183"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=493183"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=493183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}