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Norm
ISO 4221:1980
Issue date: 1980 11 01
Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method
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, ...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 7 Pages
Language:
English
ICS
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.
