Reference number
ISO 3429:1976
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
1976-07
ISO 3429:1976
8745
Publicado
(Edición 1, 1976)
Esta publicación se revisó y confirmó por última vez en 2024.
Por lo tanto, esta versión es la actual.
Resumen
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.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1976-07Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 4
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Comité Técnico :ISO/TC 226ICS :71.100.10
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