Reference number
ISO 9277:2022
© ISO 2025
International Standard
ISO 9277:2022
Determination of the specific surface area of solids by gas adsorption — BET method
Edition 3
2022-11
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Published (Edition 3, 2022)

ISO 9277:2022

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CHF 132
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2022-11
    Stage
    : International Standard published [60.60]
  • Edition
     : 3
    Number of pages
     : 22
  • Technical Committee :
    ISO/TC 24/SC 4
    ICS :
    19.120 
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