ISO 3423:1975

Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method

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.

SDO:

ISO

Language:

English

ICS Codes:

71.060.30

Status:

Published

Publish date:

1975-10-31

Standard Number:

ISO 3423:1975