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ISO 1690:1976 Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization
ISO 1686:1976 Sodium and potassium silicates for industrial use — Samples and methods of test — General
ISO 739:1976 Sodium carbonate for industrial use — Preparation and storage of test samples
ISO 740:1976 Sodium carbonate for industrial use — Determination of total soluble alkalinity — Titrimetric method
ISO 746:1976 Sodium carbonate for industrial use — Determination of matter insoluble in water at 50 degrees C
ISO 795:1976 Aluminium and aluminium alloys — Determination of copper content — Oxalyldihydrazide photometric method
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