Active standard | Published: 01/11/1975

ISO 3423:1975

Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method
(Acide sulfurique et oléums a usage industriel — Dosage du dioxyde de soufre — Méthode iodométrique)

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Detail information

Designation: ISO 3423:1975

Publication date: 01/11/1975

Pages: 3

Country: International technical standard

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Anotation

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.

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