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Chemiluminescence applied to air pollutants assessment

S. JIPA1,*

Affiliation

  1. INCDIE ICPE-CA, 313 Splaiul Unirii, P.O. Box 149, Bucharest 030138, Romania “Valachia” University of Targoviste, 18-22 Unirii Av., Targoviste 130082, Romania

Abstract

Air pollution from both stationary (e.g. factories) and mobile (e.g. cars) sources includes many substances such as sulfur dioxide, nitrogen oxides, carbon monoxide, ammonia, hydrazine etc. Chemiluminescence (CL) method for monitoring these pollutants is based on production of electromagnetic radiation as a result of a chemical reaction. One of the reaction products is in an excited state and emits light on returning onto its ground state. In a reaction chamber placed in front of photomultiplier the reactants are mixed. The chemiluminescent emission is proportional to the concentration of pollutant. A detection limit of a few ppm can be achieved. The detailed description on the CL method and suitable instruments are given. Atmospheric ozone is an important component leading to the formation of photochemical smogs. Detection and measurements of ozone by CL are also discussed. Response characteristics of the CL instrument are presented including its sensitivity to ozone detection, calibration curves and flow rate influence..

Keywords

Pollution, Chemiluminescence, Ozone measurement, Halogenated compounds.

Submitted at: Feb. 25, 2008
Accepted at: April 4, 2008

Citation

S. JIPA, Chemiluminescence applied to air pollutants assessment, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 768-772 (2008)