Withdrawal of ISO/R 977-1969

Withdrawal of ISO/R 978-1969

Sodium hydroxide for industrial use — Method of assay

Sodium hydroxide for industrial use — Determination of carbonates content — Gas-volumetric method

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

Sodium hydroxide for industrial use — Determination of sulphate content — Barium sulphate gravimetric method

Sodium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method

Sodium hydroxide for industrial use — Determination of silica content — Reduced silico-molybdic complex photometric method

Sodium hydroxide for industrial use — Determination of silica content — Gravimetric method by precipitation of quinoline molybdosilicate

Sodium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method

Withdrawal of ISO/R 987-1969

Withdrawal of ISO/R 988-1969

Withdrawal of ISO/R 989-1969

Potassium hydroxide for industrial use — Method of assay

Potassium hydroxide for industrial use — Determination of carbonates content — Gas-volumetric method

Potassium hydroxide for industrial use — Determination of chlorides content — Mercurimetric method

Potassium hydroxide for industrial use — Determination of sulphate content — Barium sulphate gravimetric method

Potassium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method

Potassium hydroxide for industrial use — Determination of silica content — Reduced molybdosilicate photometric method

Potassium hydroxide for industrial use — Determination of silica content — Gravimetric method by precipitation of quinoline molybdosilicate

Potassium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method

Withdrawal of ISO/R 998-1969

Potassium hydroxide for industrial use — Determination of sodium content — Flame emission spectrophotometric method

Withdrawal of ISO/R 1900-1971

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

Potassium hydroxide for industrial use — Determination of carbon dioxide content — Titrimetric method

Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method

Potassium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry

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

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

Sodium hydroxide for industrial use — Determination of chlorides content — Photometric method

Sodium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry

Sodium hydroxide for industrial use — Determination of calcium and magnesium contents — Flame atomic absorption method

Potassium hydroxide for industrial use — Determination of calcium and magnesium contents — Flame atomic absorption method

Sodium hydroxide for industrial use — Determination of mercury content — Dithizone photometric method

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

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

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