Reference number
ISO 4278:1977
© ISO 2024
ISO 4278:1977
Sodium fluoride for industrial use — Determination of carbonate content — Gravimetric method
Edition 1
1977-11
Withdrawn
Withdrawn (Edition 1, 1977)

Abstract

Applicable to products having contents, expressed as Na2 CO3 , more than 0.02 % (m/m). Describes the release of the carbon dioxide from a test portion by acidification and heating. Entrainment of the carbon dioxide in a flow of air and absorption in weighed absorption tubes containing soda asbestos. Specifies the weighing of the absorption tubes to determine the quantity released.

General information

  • Status
     : Withdrawn
    Publication date
     : 1977-11
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 6
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.50 
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