AS 3580.5.1-1993

Sets out a method for the determination of the concentration of oxides of nitrogen in ambient air. The method is applicable to ambient air containing oxides of nitrogen at a concentration of less than 1 ppm by volume (less than 1 mL/m(sup)3(/sup)). Nitric oxide (NO) and total oxides of nitrogen (NO(sub)x(/sub)) may be measured.

This Standard sets out a method for the determination of the concentration of oxides of nitrogen in ambient air. The method is applicable to ambient air containing oxides of nitrogen at a concentration of less than 1 p.p.m. by volume (less than 1 mL/m3). The method is specific for nitric oxide (NO) but total oxides of nitrogen (NOx) may be measured by first passing the air sample over a converter to reduce nitrogen dioxide (NO2) to nitric oxide (NO). Nitrogen dioxide (NO2) may then be calculated as the difference between NOx and NO.NOTE: Substances which interfere with the method are those which may be converted to nitric oxide including ammonia, peroxyacetyl nitrate, organic amines and organic nitrates and nitrites.

First published as AS 2447-1981.Revised and redesignated AS 3580.5.1-1993. First published as AS 2447-1981. Revised and redesignated AS 3580.5.1-1993.