{"id":301975,"date":"2024-10-19T20:37:27","date_gmt":"2024-10-19T20:37:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-92772010\/"},"modified":"2024-10-25T18:07:25","modified_gmt":"2024-10-25T18:07:25","slug":"bs-iso-92772010","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-92772010\/","title":{"rendered":"BS ISO 9277:2010"},"content":{"rendered":"<p>This International Standard specifies the determination of the overall (see Note) specific external and internal surface area of disperse (e.g. nano-powders) or porous solids by measuring the amount of physically adsorbed gas according to the Brunauer, Emmett and Teller (BET) method (see Reference [1]). It takes account of the International Union for Pure and Applied Chemistry (IUPAC) recommendations of 1984 and 1994 (see References [7][8]).<\/p>\n<blockquote>\n<p>NOTE For solids exhibiting a chemically heterogeneous surface, e.g. metal-carrying catalysts, the BET method gives the overall surface area, whereas the metallic portion of the surface area can be measured by chemisorption methods.<\/p>\n<\/blockquote>\n<p>The BET method is applicable only to adsorption isotherms of type&nbsp;II (disperse, nonporous or macroporous solids) and type&nbsp;IV (mesoporous solids, pore diameter between 2&nbsp;nm and 50&nbsp;nm). Inaccessible pores are not detected. The BET method cannot reliably be applied to solids which absorb the measuring gas.<\/p>\n<p>A strategy for specific surface area determination of microporous materials (type&nbsp;I isotherms) is described in Annex&nbsp;C.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Determination of the specific surface area of solids by gas adsorption. BET method<\/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>2010<\/td>\n<td>34<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":301979,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[255,2641],"product_tag":[],"class_list":{"0":"post-301975","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-040-20","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\/301975","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\/301979"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=301975"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=301975"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=301975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}