ISO-3429 › Sodium fluoride primarily used for the production of aluminium -- Determination of iron content -- 1,10- Phenanthroline photometric method

ISO-3429 - 1ST EDITION - CURRENT


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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.

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Document Number

ISO 3429:1976

Revision Level

1ST EDITION

Status

Current

Publication Date

July 15, 1976

Committee Number

ISO TC 47/SC 7