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ISO 622:2025

Coal and coke — Determination of phosphorus — Reduced molybdophosphate photometric method

Jun 25, 2025

General information

60.60     Jun 25, 2025

ISO

ISO/TC 27/SC 5

International Standard

73.040     75.160.10  

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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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PREVIOUSLY

WITHDRAWN
ISO 622:2016

NOW

PUBLISHED
ISO 622:2025
60.60 Standard published
Jun 25, 2025