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ISO 910:1977 Sulphuric acid and oleum for industrial use — Determination of total acidity, and calculation of free sulphur trioxide content of oleum — Titrimetric method
ISO 4280:1977 Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
ISO 894:1977 Surface active agents — Technical sodium primary alkylsulphates — Methods of analysis
ISO 895:1977 Surface active agents — Technical sodium secondary alkylsulphates — Methods of analysis
ISO 1104:1977 Surface active agents — Technical sodium alkylarylsulphonates (excluding benzene derivatives) — Methods of analysis
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