ISO 8008:1986

Aluminium oxide primarily used for the production of aluminium — Determination of specific surface area by nitrogen adsorption — Single-point method ISO 8008:1986

Publication date:   Aug 21, 1986

95.99 Withdrawal of Standard   Nov 1, 2005

General information

95.99 Withdrawal of Standard   Nov 1, 2005


ISO/TC 226 Materials for the production of primary aluminium

International Standard

71.100.10   Materials for aluminium production



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At ambient temperature and at atmospheric pressure nitrogen is introduced into two bottles of equal volume one of which contains the test portion while the other is empty. The connected bottles are immersed in the refrigerant bath of liquid nitrogen. Since some nitrogen is adsorbed by the sample a differential pressure occurs between the two bottles and is measured by means of a differential manometer. From this difference, the number of molecules absorbed on the surface is calculated. The area occupied by an absorbed nitrogen molecule is taken as 16.2 x 10^-20 m^2. From this values the surface area is calculated.

Life cycle


ISO 8008:1986
95.99 Withdrawal of Standard
Nov 1, 2005


ISO 8008:2005