International Standard
ISO 3429:1976
Sodium fluoride primarily used for the production of aluminium — Determination of iron content — 1,10- Phenanthroline photometric method
Reference number
ISO 3429:1976
ISO 3429:1976
Edition 1
1976-07
1976-07
© ISO 2024
International Standard
p
ISO 3429:1976
8745
Published
(Edition 1, 1976)
This standard was last reviewed and confirmed in 2015.
Therefore this version remains current.
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
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Status: PublishedPublication date: 1976-07Stage: Close of review [90.60]
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Edition: 1Number of pages: 4
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Technical Committee :ISO/TC 226ICS :71.100.10
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