Sodium fluoride for industrial use — Determination of water-insoluble matter
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Sodium fluoride for industrial use — Determination of moisture content
Sodium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method
Ammonium sulphate for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method
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Ammonium sulphate for industrial use — Determination of free acidity — Titrimetric method
Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
Anhydrous hydrogen fluoride for industrial use — Sampling
Aqueous hydrofluoric acid for industrial use — Sampling and methods of test
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
