Numéro de référence
ISO 5934:1980
ISO 5934:1980
© ISO 2024
ISO 5934:1980
Borates de sodium bruts à usage industriel — Dosage du cuivre et du manganèse solubles en milieu alcalin — Méthodes photométriques au bis(dibenzyldithiocarbamate) de zinc et à la formaldéhyde oxime
Edition 1
1980-11
1980-11
Annulée
Résumé
Describes a method applicable to products in which the alkalisoluble copper and manganese contents excess 0,25 and 0,5 mg/kg, respectively. The principle consists in successively determining the manganese and copper contents of the two coloured complexes obtained during the analysis, followed by photometric measurements at wavelengths of about 435 nm and 450 nm, respectively.