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About This Item
Full Description
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.
Document History
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ISO 9277:2022
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Determination of the specific surface area of solids by gas adsorption - BET method- Most Recent
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ISO 9277:2010
Determination of the specific surface area of solids by gas adsorption - BET method- Historical Version
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ISO 9277:1995
Determination of the specific surface area of solids by gas adsorption using the BET method- Historical Version