Reference number
ISO 2460:1973
ISO 2460:1973
© ISO 2025
International Standard
ISO 2460:1973
Sodium hydrogen carbonate for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
Edition 1
1973-04
1973-04
ISO 2460:1973
7373
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2025.
Therefore this version remains current.
Abstract
The method is applicable to products having a content equal to or greater than 0,1 mg/kg. The principle concists in reduction of the iron(III) by hydroxylammoniumchloride. Formation of a iron(II)-1,10-phennanthroline complex in a buffered solution. Photometric measurement of the coloured complex at a wavelength of about 510 nm.