Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
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Anhydrous hydrogen fluoride for industrial use — Sampling
Aqueous hydrofluoric acid for industrial use — Sampling and methods of test
Aqueous hydrofluoric acid for industrial use — Sampling and methods of test Amendment 1
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 chlorate for industrial use — Determination of chlorate content — Dichromate titrimetric method
Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method
Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric method
Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of moisture content — Gravimetric method
Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
Sulphur for industrial use — Determination of ash at 850-900 degrees C and of residue at 200 degrees C
Sulphur for industrial use — Determination of loss in mass at 80 degrees C
