Determination of the specific surface area of solids by gas adsorption - BET method
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].
NOTEÂ Â Â Â Â Â 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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 9277 |
| Publication Date | Not Available |
| Language | en - English |
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| Committee | ISO/TC 24/SC 4 |