ISO 5437:1992
Acid-grade and ceramic-grade fluorspar — Determination of barium sulfate content — Gravimetric method
Reference number
ISO 5437:1992
Edition 2
1992-12
Withdrawn
ISO 5437:1992
11482
Withdrawn (Edition 2, 1992)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

  •  : Withdrawn
     : 1992-12
    : Withdrawal of International Standard [95.99]
  •  : 2
     : 3
  • ISO/TC 175
    73.080 
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