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Potassium hydroxide for industrial use — Sampling — Test sample — Preparation of the main solution for carrying out certain determinations

90.93 Standard confirmed

ISO/TC 47

Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method

90.93 Standard confirmed

ISO/TC 47

Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption spectrometric method

90.93 Standard confirmed

ISO/TC 47

Ammonia solution for industrial use — Determination of ammonia content — Titrimetric method

90.93 Standard confirmed

ISO/TC 47

Ammonia solution for industrial use — Determination of residue after evaporation at 105 degrees C — Gravimetric method

90.93 Standard confirmed

ISO/TC 47

Sodium hydroxide for industrial use — Method of assay

90.93 Standard confirmed

ISO/TC 47

Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method

90.93 Standard confirmed

ISO/TC 47