ISO 3423:1975
Sulphuric acid and oleums for industrial use; Determination of sulphur dioxide content; Iodometric method

Standard No.

ISO 3423:1975

Release Date

1975

Published By

International Organization for Standardization (ISO)

Latest

ISO 3423:1975

Scope

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.

ISO 3423:1975 history

• 1975 ISO 3423:1975 Sulphuric acid and oleums for industrial use; Determination of sulphur dioxide content; Iodometric method