{"id":11783,"date":"2024-10-16T20:49:32","date_gmt":"2024-10-16T20:49:32","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d4222-2008\/"},"modified":"2024-10-24T11:34:21","modified_gmt":"2024-10-24T11:34:21","slug":"astm-d4222-2008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d4222-2008\/","title":{"rendered":"ASTM-D4222 2008"},"content":{"rendered":"<\/p>\n<p id=\"s00002\">1.1 This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen. A static volumetric measuring system is used to obtain sufficient equilibrium adsorption points on each branch of the isotherm to adequately define the adsorption and desorption branches of the isotherm. Thirty points evenly spread over the isotherm is considered to be the minimum number of points that will adequately define the isotherm.<\/p>\n<p>1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.<\/p>\n<p id=\"s00003\">1.3 <span class=\"italic\">This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.<\/span><\/p>\n<p><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>1<b><\/td>\n<td>Scope <br \/> Referenced Documents <br \/> Terminology <br \/> Summary of Test Method  <\/td>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>Significance and Use <br \/> Apparatus <br \/> Reagents <br \/> Procedure-Sample Preparation and Degassing <br \/> FIG. 1   <\/td>\n<\/tr>\n<tr>\n<td><b>3<b><\/td>\n<td>Procedure-Dead-Space Determination <br \/> Procedure-Nitrogen Adsorption  <\/td>\n<\/tr>\n<tr>\n<td><b>4<b><\/td>\n<td>Procedure-Nitrogen Desorption <br \/> Calculations  <\/td>\n<\/tr>\n<tr>\n<td><b>5<b><\/td>\n<td>Presentation of Data <br \/> Precision and Bias <br \/> FIG. 2   <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Keywords  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>D4222-03(2008) Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements<\/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\/astm\/\"><b>ASTM<\/b><\/a><\/td>\n<td>2008<\/td>\n<td>6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":11784,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[999,2637],"product_tag":[],"class_list":{"0":"post-11783","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-71-040-30","7":"product_cat-astm","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\/11783","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\/11784"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=11783"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=11783"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=11783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}