95.99 Withdrawal of Standard Mar 3, 2010
ISO
ISO/TC 175 Fluorspar
International Standard
73.080 Non-metalliferous minerals
The method is based on evaporation to dryness of a test portion in the presence of hydrofluoric acid and concentrated sulfuric acid, extraction of the soluble salts from the mixture, filtration, drying and weighing of the residual barium sulfate. Applies to products having barium sulfate contents equal to or greater than 0,1 % (m/m).
WITHDRAWN
ISO 5437:1988
WITHDRAWN
ISO 5437:1992
95.99
Withdrawal of Standard
Mar 3, 2010