ISO 4221:1980
Air quality; Determination of mass concentration of sulphur dioxide in ambient air; Thorin spectrophotometric method

Standard No.

ISO 4221:1980

Release Date

1980

Published By

International Organization for Standardization (ISO)

Latest

ISO 4221:1980

Scope

Applies to the range of 3,5 to 150 g/m3, 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.

ISO 4221:1980 history

• 1980 ISO 4221:1980 Air quality; Determination of mass concentration of sulphur dioxide in ambient air; Thorin spectrophotometric method