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      • ISO 9277:2022
      Codes & Standards - Purchase

      ISO 9277:2022

      Determination of the specific surface area of solids by gas adsorption — BET method

      SKU: iso_071014_178754 Published by ISO Publication Year 2022 3 Edition 22 pages

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      • Overview
      This document specifies the determination of the overall specific external and internal surface area of either disperse (e.g. nano-powders) or porous, solids by measuring the amount of physically adsorbed gas according to the method of Brunauer, Emmett and Teller method,[1] based on the 2015 International Union for Pure and Applied Chemistry (IUPAC) recommendations[3].
      NOTE       For solids exhibiting a chemically heterogeneous surface, for example, metal-carrying catalyst, the BET method gives the overall surface area, whereas the metallic portion of the surface area can be measured by chemisorption methods.

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