ISO 622:2025
International Standard
Current Edition
·
Approved on
25 June 2025
Coal and coke — Determination of phosphorus — Reduced molybdophosphate photometric method
ISO 622:2025 Files
English
7 Pages
Current Edition
OMR
31.89
ISO 622:2025 Scope
This document specifies a reduced molybdophosphate photometric method for the determination of the total phosphorus mass fraction 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.
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