The standard applies to the determination of ozone in air in concentrations from 50 to 2000ug/m3 (see 9). Apart from chlorine and nitrogen dioxide, the determination is not affected by contaminants normally found in outdoor air (see 10). The mois ure content of the air also has no influence.
NEN 2789-1983 history
1983NEN 2789-1983 Air quality - Ambient air - Photometric determination of ozone content with indigo disulphonate