Indirect determination of nitrogen oxides by a chemiluminescence technique
article
NO2 concentrations in outdoor air can be determined indirectly by measuring the equilibrium ozone concentration under continuous u.v. irradiation. This concentration can be measured very accurately by a chemiluminescence technique using Rhodamine B as a light emitting compound. The reaction between ozone and Rhodamine B is highly specific. No other components of air pollution at concentrations occurring in outdoor air interfere. The equilibrium ozone concentration on photolysis of the nitrogen dioxide present is a function of the wavelength, the light intensity and the temperature. By keeping these parameters constant, NO2 concentrations can be determined very accurately with a lower detection limit of 5 μg NO2 m-3 air. © 1972.
Chemicals/CAS: nitrogen dioxide, 10102-44-0; nitrous oxide, 10024-97-2; Nitrogen Dioxide, 10102-44-0; Nitrous Oxide, 10024-97-2
Chemicals/CAS: nitrogen dioxide, 10102-44-0; nitrous oxide, 10024-97-2; Nitrogen Dioxide, 10102-44-0; Nitrous Oxide, 10024-97-2
TNO Identifier
227359
ISSN
00046981
Source
Atmospheric Environment, 6(11), pp. 807-814.
Pages
807-814
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