Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
NORMA vydaná dňa 1.11.1975
Designation standards: ISO 3423:1975
Publication date standards: 1.11.1975
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Kategória: Technické normy ISO
Description / Abstract: Applicable of products the SO2 content of which is equal to or more than 2 mg/kg. Based on the displacement of the sulphur dioxide present in the test portion by a current of pure nitrogen and absorption in a known volume of iodine solution. Titration of the excess of iodine with standard volumetric sodium thiosulphate solution. The diagram of the glass apparatus for absorption is shown in a figure.