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ISO 9277:2022

Determination of the specific surface area of solids by gas adsorption — BET method
8 nën 2022

General information

60.60     8 nën 2022

ISO

ISO/TC 24/SC 4

International Standard

19.120  

anglisht  

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 9277:2010

NOW

PUBLISHED
ISO 9277:2022
60.60 Standard published
8 nën 2022