Reference number
ISO 5437:1992
© ISO 2025
ISO 5437:1992
Acid-grade and ceramic-grade fluorspar — Determination of barium sulfate content — Gravimetric method
Edition 2
1992-12
Withdrawn
Withdrawn (Edition 2, 1992)

Abstract

The method is based on evaporation to dryness of a test portion in the presence of hydrofluoric acid and concentrated sulfuric acid, extraction of the soluble salts from the mixture, filtration, drying and weighing of the residual barium sulfate. Applies to products having barium sulfate contents equal to or greater than 0,1 % (m/m).

General information

  • Status
     : Withdrawn
    Publication date
     : 1992-12
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 2
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 175
    ICS :
    73.080 
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