NEN-ISO 9277
Determination of the specific surface area of solids by gas adsorption using the BET method
inactive
| Organization: | NEN |
| Publication Date: | 1 June 1995 |
| Status: | inactive |
| Page Count: | 18 |
| ICS Code (Particle size analysis. Sieving): | 19.120 |
scope:
Specifies the determination of the total specific external and internal surface area of disperse or porous solids by measuring the amount of physically adsorbed gas according to the method of Brunauer, Emmett and Teller (BET method) based on the 1984 IUPAC Recommendations. The BET method is applicable only to adsorption isotherms of type II (disperse, nonporous or macroporous solids) and type IV (mesoporous solids, pore diameter between 2 nm and 50 nm. Inaccessible pores are not detected. The BET method cannot reliably be applied to type I isotherms or to solids which absorb the measuring gas.
Document History
November 1, 2022
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...
September 1, 2010
Determination of the specific surface area of solids by gas adsorption - BET method
This International Standard specifies the determination of the overall (see Note) specific external and internal surface area of disperse (e.g. nano-powders) or porous solids by measuring the amount...
NEN-ISO 9277
June 1, 1995
Determination of the specific surface area of solids by gas adsorption using the BET method
Specifies the determination of the total specific external and internal surface area of disperse or porous solids by measuring the amount of physically adsorbed gas according to the method of...