90.92 Standard to be revised May 20, 2023
ISO
ISO/TC 27/SC 5 Methods of analysis
International Standard
73.040 Coals
Published
Specifies methods of determining the sulfate and pyrite sulfur contents of coals, including brown coals and methods of calculating the amount of organic sulfur present. Replaces the first edition.
WITHDRAWN
ISO 157:1975
PUBLISHED
ISO 157:1996
90.92
Standard to be revised
May 20, 2023
PUBLISHED
ISO 157:1996/Cor 1:1999
IN_DEVELOPMENT
ISO/DIS 157