Abstract / 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.
ISO 4221:1980Published
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