This Standard sets out a method for determining ozone in ambient air using a direct-reading instrument. The method applies to the determination of ozone in ambient air within the concentration range 0 to 0.5 p.p.m. by volume (0 to ≈ 1100 μg/m 3 ).

This Standard sets out a method for determining ozone in ambient air using a direct-reading instrument. The method applies to the determination of ozone in ambient air within the concentration range 0 to 0.5 p.p.m. by volume (0 to ≈ 1100 μg/m 3 ).