90.92 Standard to be revised May 20, 2023
ISO
ISO/TC 27/SC 5 Methods of analysis
International Standard
75.160.10 Solid fuels
Published
ISO 622:2016 specifies a reduced molybdophosphate photometric method for the determination of the total phosphorus content of hard coal, lignites and coke. Two methods for taking the phosphorus into solution are specified, namely extraction from the coal or coke ash with acid or by repeated oxidation of the coal or coke, by acid, to remove carbonaceous matter.
WITHDRAWN
ISO 622:1981
PUBLISHED
ISO 622:2016
90.92
Standard to be revised
May 20, 2023
IN_DEVELOPMENT
ISO/DIS 622