{"id":623727,"date":"2024-11-05T23:55:00","date_gmt":"2024-11-05T23:55:00","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/iso-731-31977\/"},"modified":"2024-11-05T23:55:00","modified_gmt":"2024-11-05T23:55:00","slug":"iso-731-31977","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/iso\/iso-731-31977\/","title":{"rendered":"ISO 731-3:1977"},"content":{"rendered":"<p>The principle consists in a quantitative oxidation of the formic acid in a test portion with excess mercury(II) oxide. Potentiometric titration of the residual acids with standard volumetric sodium hydroxide solution. The method is applicable to products containing 0,5 to 6,0 % (m\/m) of other acids, expressed as acetic acid. ISO\/R 731 has been subdivised into seven parts. ISO 731\/3 replaces clause 4 of ISO Recommendation R 731-1968.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Formic acid for industrial use \u2014 Methods of test \u2014 Part 3: Determination of content of other acids \u2014 Potentiometric method<\/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>1977-02<\/td>\n<td>4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1017,2634],"product_tag":[],"class_list":{"0":"post-623727","1":"product","2":"type-product","3":"status-publish","5":"product_cat-71-080-40","6":"product_cat-iso","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/623727","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:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=623727"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=623727"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=623727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}