Reference number
ISO 5935:1984
© ISO 2024
ISO 5935:1984
Crude sodium borates for industrial use — Determination of total and alkali-soluble silica contents — Molybdosilicate spectrometric method
Edition 1
1984-06
Withdrawn
Withdrawn (Edition 1, 1984)

Abstract

Specifies a method using test solutions to be prepared by fusion of a test portion with sodium carbonate for the determination of the total silica content, and by dissolution of the alkalisoluble part of a test portion in sodium hydroxide solution for the determination of the alkali-soluble silica content. This results in the formation of molybdosilicate, followed by spectrometric measurement at a wavelength of about 400 nm. Applies to products having total silica contents in the range 0,4 to 4,0 % (m/m) and alkali-soluble silica contents in the range 0,01 to 0,05 % (m/m).

General information

  • Status
     : Withdrawn
    Publication date
     : 1984-06
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.50 
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