Numéro de référence
ISO 1389-11:1977
ISO 1389-11:1977
© ISO 2024
ISO 1389-11:1977
Anhydride phtalique à usage industriel — Méthodes d'essai — Partie 11: Dosage du fer — Méthode photométrique au bipyridyle-2,2'
Edition 1
1977-03
1977-03
Annulée
Résumé
The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1389/8). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a wavelength of about 510 nm. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.