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.

Begin

2023-05-31

Planned document number

DIN ISO 9277

Project number

00519579

Responsible national committee

NA 005-11-43 AA - Particle characterization, porosity and pore size distribution (national mirror committee for ISO/TC 24/SC 4/WG 3)  

Responsible international committee

ISO/TC 24/SC 4/WG 3 - Pore size distribution, porosity  

draft standard

Determination of the specific surface area of solids by gas adsorption - BET method (ISO 9277:2022)
Order from DIN Media

previous edition(s)

Determination of the specific surface area of solids by gas adsorption - BET method (ISO 9277:2010)
2014-01

Order from DIN Media