Ambient air; determination of a gaseous acid air pollution index; titrimetric method with indicator or potentiometric end-point detection; identical with ISO 4220:1983— 6 стр.
Air quality; determination of mass concentration of sulfur dioxide in ambient air; thorin spectrophotometric method; identical with ISO 4221:1980— 8 стр.
Ambient air; determination of a gaseous acid air pollution index; titrimetric method with indicator or potentiometric end-point detection; identical with ISO 4220:1983— 6 стр.
Air quality; determination of mass concentration of sulfur dioxide in ambient air; thorin spectrophotometric method; identical with ISO 4221:1980— 8 стр.
