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ISO 621:1981WithdrawnManganese ores — Determination of metallic iron content (metallic iron content not exceeding 2 %) — Sulphosalicylic acid photometric methodInternational Standard · Published 1 Nov 1981 · ISO/TMBG ISO 4294:1984WithdrawnManganese ores and concentrates — Determination of copper content — Extraction-spectrometric and spectrometric methodsInternational Standard · Published 1 Dec 1984 · ISO/TMBG ISO 4294:1978WithdrawnManganese ores and concentrates — Determination of copper content — Extraction-photometric and photometric methodsInternational Standard · Published 1 Aug 1978 · ISO/TC 65 ISO 4295:1979WithdrawnManganese ores and concentrates — Determination of aluminium content — Photometric and gravimetric methodsInternational Standard · Published 1 Feb 1979 · ISO/TC 65 ISO 4298:1984WithdrawnManganese ores and concentrates — Determination of manganese content — Potentiometric methodInternational Standard · Published 1 Nov 1984 · ISO/TC 132 ISO 4298:1978WithdrawnManganese ores and concentrates — Determination of manganese content — Potentiometric methodInternational Standard · Published 1 Aug 1978 · ISO/TC 65 ISO 4299:1980WithdrawnManganese ores — Determination of moisture contentInternational Standard · Published 1 Apr 1980 · ISO/TC 65 ISO 4300:1984WithdrawnManganese ores and concentrates — Determination of lead content — Polarographic methodsInternational Standard · Published 1 Dec 1984 · ISO/TC 65