ISO 9277:2022 PDF

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.

ISO 9277:2022 Referenced Document

ISO 14488 Particulate materials — Sampling and sample splitting for the determination of particulate properties — Amendment 1
ISO 8213 Chemical products for industrial use; Sampling techniques; Solid chemical products in the form of particles varying from powders to coarse lumps

2022 ISO 9277:2022 Determination of the specific surface area of solids by gas adsorption — BET method
2010 ISO 9277:2010 Determination of the specific surface area of solids by gas adsorption - BET method
1995 ISO 9277:1995 Determination of the specific surface area of solids by gas adsorption using the BET method