Reference number
ISO 1983:1977
© ISO 2024
ISO 1983:1977
Nitric acid for industrial use — Determination of sulphated ash — Gravimetric method
Edition 1
1977-11
Withdrawn
Withdrawn (Edition 1, 1977)

Abstract

The principle of the method consists inevaporation of a test portion in a platinum dish, conversion of the residue to sulphates by treatment with sulphuric acid; ignition in an electric furnace, controlled at (800 +- 25) °C, and weighing. Replaces ISO Recommendation R 1983-1971.

General information

  • Status
     : Withdrawn
    Publication date
     : 1977-11
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.30 
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