{"id":309040,"date":"2024-10-19T21:13:03","date_gmt":"2024-10-19T21:13:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-77812017\/"},"modified":"2024-10-25T18:54:16","modified_gmt":"2024-10-25T18:54:16","slug":"bs-iso-77812017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-77812017\/","title":{"rendered":"BS ISO 7781:2017"},"content":{"rendered":"<p>This document specifies three methods for the determination of the soap and organic-acid content of raw styrene-butadiene rubber (SBR).<\/p>\n<ul>\n<li>\n<p>Method A is the titration method using indicator reagent.<\/p>\n<\/li>\n<li>\n<p>Method B is the titration method using an automatic potentiometric titrator.<\/p>\n<\/li>\n<li>\n<p>Method&nbsp;C is the back titration method using an automatic potentiometric titrator.<\/p>\n<\/li>\n<\/ul>\n<p>Since the soaps and organic acids present in the rubber are not single chemical compounds, the method gives only an approximate value for the soap and organic-acid content.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions <br \/> 4 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>5 Reagents <br \/> 6 Apparatus  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>7 Sampling and sample preparation <br \/> 8 Procedure <br \/> 8.1 Preparation of the test solution <br \/> 8.2 Method A \u2014 Titration method using indicator reagent <br \/> 8.2.1 Procedure for determination of soap content <br \/> 8.2.2 Procedure for determination of organic-acid content  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>8.3 Method B \u2014 Titration method using automatic potentiometric titrator <br \/> 8.3.1 Procedure for determination of soap content <br \/> 8.3.2 Procedure for determination of organic-acid content <br \/> 8.4 Method C \u2014 Back titration method using automatic potentiometric titrator <br \/> 8.4.1 Preparation  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>8.4.2 Sample titration procedure <br \/> 8.4.3 Blank titration procedure <br \/> 8.4.4 Determination of equivalence points <br \/> 9 Expression of results <br \/> 9.1 Soap content  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>9.2 Organic-acid content  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>10 Precision data <br \/> 11 Test report  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>Annex A (informative) Test for rosin  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>Annex B (informative) Precision data for method C  <\/td>\n<\/tr>\n<tr>\n<td><b>18<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Styrene-butadiene rubber, raw. Determination of soap and organic-acid content<\/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>2017<\/td>\n<td>20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":309043,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1172,2641],"product_tag":[],"class_list":{"0":"post-309040","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-83-040-10","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\/309040","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\/309043"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=309040"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=309040"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=309040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}