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ISO 3423:1975

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

Nov 1, 1975

General information

90.93     Feb 14, 2025

ISO

ISO/TC 47

International Standard

71.060.30  

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Published

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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.

Life cycle

NOW

PUBLISHED
ISO 3423:1975
90.93 Standard confirmed
Feb 14, 2025

National adoptions

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

90.93   Standard confirmed

H047 more

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

95.99   Withdrawal of Standard

H047 more