International Standard
ISO 622:2025
Coal and coke — Determination of phosphorus — Reduced molybdophosphate photometric method
Reference number
ISO 622:2025
Edition 3
2025-06
© ISO 2026
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Published (Edition 3, 2025)

ISO 622:2025

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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2025-06
    Stage
    : International Standard published [60.60]
  • Edition
     : 3
    Number of pages
     : 7
  • Technical Committee :
    ISO/TC 27/SC 5
    ICS :
    73.040  75.160.10 
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