Reference number
ISO/R 909:1968
© ISO 2024
ISO/R 909:1968
Hydrochloric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl spectrophotometric method
Edition 1
1968-12
Withdrawn
Withdrawn (Edition 1, 1968)

Abstract

The principle consists in evaporation of the test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of an iron(II)-2.2'-bipyridyl complex in a buffered medium at a pH value between 4.5 and 6. Photometric measurement of the coloured complex at a wavelength of about 522 nm.

General information

  • Status
     : Withdrawn
    Publication date
     : 1968-12
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 5
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.30 
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