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ISO 4221:1980

Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method

Publication date:   Nov 1, 1980

General information

90.93 Standard confirmed   Sep 18, 2023

ISO

ISO/TC 146/SC 3 Ambient atmospheres

International Standard

13.040.20   Ambient atmospheres

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Scope


Applies to the range of 3,5 to 150 micrograms per cubic metre, assuming an
air sample volume of 2 m3 and a sample solution volume of 50 ml. For
higher concentrations, dilution of the sample may be
necessary.

Life cycle

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PUBLISHED
ISO 4221:1980
90.93 Standard confirmed
Sep 18, 2023