ISO/R 909:1968
The principle consists in evaporation of the test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of an iron(II)-2.2'-bipyridyl complex in a buffered medium at a pH value between 4.5 and 6. Photometric measurement of the coloured complex at a wavelength of about 522 nm.
OEN:
ISO
Langue:
English
Code(s) de l'ICS:
71.060.30
Statut:
Annulée
Date de Publication:
1968-11-30
Numéro Standard:
ISO/R 909:1968