Reference number
ISO 3429:1976
© ISO 2024
International Standard
ISO 3429:1976
Sodium fluoride primarily used for the production of aluminium — Determination of iron content — 1,10- Phenanthroline photometric method
Edition 1
1976-07
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Published (Edition 1, 1976)
This publication was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 3429:1976

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Format
CHF 42
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Abstract

Applicable to the determination of Fe contents, expressed as Fe2 O3 , of more than 0.020 % (m/m). Covers the dissolution of a test portion by alkaline fusion by means of sodium carbonate and boric acid. Dissolving of the residue with nitric acid solution and reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium at a pH between 3.5 and 4.2. Photometric measurement of the coloured complex at a wavelength of about 510 nm.

General information

  • Status
     : Published
    Publication date
     : 1976-07
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 226
    ICS :
    71.100.10 
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