ISO 7990:1985

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

Publication date: 12 dhj 1985

General information

Current stage: 90.93 Effective date: 25 mar 2022

Originator: ISO

Owner: ISO/TC 132

Type: International Standard

ICS: 73.060.20

Gjuha: frëngjisht anglisht

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Statusi: Publikuar

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Scope

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.

Life cycle

PREVIOUSLY

Revises
ISO/R 313:1963

NOW

PUBLISHED
ISO 7990:1985
90.93 Standard confirmed
25 mar 2022

REVISED BY

ABANDON
ISO/WD 7990

National adoptions

SSH ISO 7990:1985

DPS

Minerale mangani dhe koncentrate - Përcaktimi i përmbajtjes totale të hekurit - Metoda titrimetrike pas reduktimit dhe metoda

60.60 Standard published

DPS/KT 133 më tepër

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