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ISO 5975:1983PublishedChromium ores — Determination of calcium and magnesium contents — EDTA titrimetric methodISO 5997:1984PublishedChromium ores and concentrates — Determination of silicon content — Molecular absorption spectrometric method and gravimetric methodISO 6127:1981PublishedChromium ores — Determination of phosphorus content — Reduced molybdophosphate photometric methodISO 6129:1981PublishedChromium ores — Determination of hygroscopic moisture content in analytical samples — Gravimetric methodISO 6130:1985PublishedChromium ores — Determination of total iron content — Titrimetric method after reductionISO 6153:1989PublishedChromium ores — Increment samplingISO 6154:1989PublishedChromium ores — Preparation of samplesISO 6331:2024PublishedChromium ores and concentrates — Determination of chromium content — Titrimetric methodISO 6629:1981PublishedChromium ores and concentrates — Methods of chemical analysis — General instructionsISO 8889:1988PublishedChromium ores and concentrates — Determination of aluminium content — Complexometric methodISO 6331:1983WithdrawnChromium ores and concentrates — Determination of chromium content — Titrimetric method