Active standard | Published: 01/11/1980

ISO 4221:1980

Air quality — Determination of mass concentration of sulphur dioxide in ambient air — Thorin spectrophotometric method
(Qualité de l´air — Détermination de la concentration en masse du dioxyde de soufre dans l´air ambiant — Méthode spectrophotométrique au thorin)

Available languages: English, French

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Detail information

Designation: ISO 4221:1980

Publication date: 01/11/1980

Pages: 7

Country: International technical standard

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Anotation

Description / Abstract: 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.

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