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ISO/WD 7990

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

General information

20.98   Project deleted   Jan 15, 1997

ISO

ISO/TC 65 Manganese and chromium ores

International Standard

Life cycle

PREVIOUSLY

PUBLISHED
ISO 7990:1985

NOW

ABANDON
ISO/WD 7990
20.98 Project deleted
Jan 15, 1997