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…
The Standard specifies the following characteristics of the oil. Appearance: Mobile liquid. Colour: Pale yellow to brown. Odour: Spicy, resembling eugenol. Relative density at 20/20 °C: 1,027 - 1,048. Refractive index at 20 °C: 1,5250 - 1,5400. Optical rotation at 20 °C: Range from - 5 to 0 . Solubility in 70 % (V/V) ethanol at 20 °C: 1 : 2. Phenols content: Minimum 65 % (V/V).
Potassium hydroxide for industrial use — Determination of chlorides content — Mercurimetric method
The method is applicable to products the chloride content of which is greater than 25 mg/kg. The procedure is based on titration of the chloride ions with mercury(II) nitrate in the presence of diphenylcarbazone as indicator. - Replaces ISO Recommendation R 992-1969.
Sodium chlorate for industrial use — Determination of chlorate content — Dichromate titrimetric meth...
Not applicable to the analysis of mixtures for agricultural use such as herbicides or pesticides. Indicates the risk in handling with clorates. Dissolution of the test portion in water and reduction by a known quantity, in access, of an iron(II) salt in a sulphuric acid and orthophosphoric acid medium. Titration of the excess iron(II) salt with a standard volumetric solution of potassium…
