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Potassium hydroxide for industrial use — Sampling — Test sample — Preparation of the main solution for carrying out certain determinations
90.20 Standard under periodical review
Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
90.93 Standard confirmed
Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption spectrometric method
90.93 Standard confirmed
Ammonia solution for industrial use — Determination of ammonia content — Titrimetric method
90.20 Standard under periodical review
Ammonia solution for industrial use — Determination of residue after evaporation at 105 degrees C — Gravimetric method
90.20 Standard under periodical review
Sodium hydroxide for industrial use — Determination of chloride content — Mercurimetric method
90.93 Standard confirmed
