ISO 7990:1985

Manganese ores and concentrates — Determination of total iron content — Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method

Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in conjunction with ISO 4297. Specifies principle, reactions (method A only), reagents, apparatus, sampling and samples, procedure and expression of results.

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

73.060.20

Statut:

Publié

Date de Publication:

1985-12-11

Numéro Standard:

ISO 7990:1985