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ISO 6384:1981 Surface active agents — Technical ethoxylated fatty amines — Methods of analysis
ISO 6835:1981 Surface active agents — Washing powders — Determination of total boron content — Titrimetric method
ISO 6629:1981 Chromium ores and concentrates — Methods of chemical analysis — General instructions
ISO 697:1981 Surface active agents — Washing powders — Determination of apparent density — Method by measuring the mass of a given volume
ISO 4571:1981 Manganese ores and concentrates — Determination of potassium and sodium content — Flame atomic emission spectrometric method
ISO 6127:1981 Chromium ores — Determination of phosphorus content — Reduced molybdophosphate photometric method
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