Reference number
ISO 3239:1975
© ISO 2024
ISO 3239:1975
Sodium sulphate for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
Edition 1
1975-07
Withdrawn
Withdrawn (Edition 1, 1975)

Abstract

Applicable to products the Fe content of which is equal to or more than 0.0003 % (m/m). Dissolution of the test sample in delute hydrochloric acid and bromine water by heating. Preliminary reduction of the iron(III) by hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium. Photometric measurement of the coloured complex at a wavelength of about 510 nm.

General information

  • Status
     : Withdrawn
    Publication date
     : 1975-07
    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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