The Standard specifies the following characteristics of the oil. Appearance: Clear liquid. Colour: Greenish-yellow. Odour: Resembling oil of sweet orange. Relative density at 20/20 °C: 0,852 - 0,860. Refractive index at 20 °C: 1,4740 - 1,4790. Optical rotation at 20 °C: Range from + 91 to + 96 . Carbonyl compounds content, expressed as decanal: Minimum 1,0 %. Residue on evaporation: 5,0 % - 10,0…
Sodium and potassium silicates for industrial use — Determination of sulphates content — Barium sulp...
Applicable to the analysis of products having contents either above 0.1 % (m/m) or above 0.25 % (m/m) according to whether the product is readily or sparingly soluble in water. The principle consists in dissolution of a test portion either directly or after alkaline fusion. Separation of the insoluble matter. Precipitation, while boiling, of the sulphate ions in an acid medium. Filtration,…
Sodium hydroxide for industrial use — Determination of chlorides content — Photometric method
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50 mg/kg the method specified in ISO 981 shall be used. The principle consists in the quantitative displacement of the thiocyanate ions of the mercury(II) thiocyanate by the cloride ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form…
Sodium hydroxide for industrial use — Sampling — Test Sample — Preparation of the main solution for ...
Indicates the conditions under which the test sample shall be prepared and relates to particular properties which require particular precausions: the samples shall be taken rapidly in a dry atmosphere, storage in an airtight bottle. The bottle shall be made from an inert material such as polyethylene. Preparation of the main solution with distilled carbonat- free water. If the silica content is…
Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50mg/kg the method specified in ISO 992 shall be used. The principle consists in quantitative displacement of the thiocyanate (SCN- ) ions of the mercury(II) thiocyanate by the cloride (Cl- ) ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate…
