Atmospheric trace gas monitoring by CO2 laser photoacoustic spectroscopy

Markus W. Sigrist; Andreas Thoeny

doi:10.1117/12.140180

12 February 1993 Atmospheric trace gas monitoring by CO₂ laser photoacoustic spectroscopy

Markus W. Sigrist, Andreas Thoeny

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140180
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Air pollution monitoring requires sensitive and selective detection schemes. This paper reviews the main theoretical and experimental characteristics of gas phase laser photoacoustic spectroscopy. A mobile CO₂ laser photoacoustic system is described in more detail. Examples demonstrate the great potential of this technique. Various compounds could successfully be detected in urban and rural environments with excellent time resolution. The sensitivity permits the detection of trace gases at ppb concentrations and the selectivity in some cases even permits the differentiation between isomers. Present studies include measurements with isotopic CO₂ lasers as well as the implementation of a continuously tunable high pressure CO₂ laser.

Citation Download Citation

Markus W. Sigrist and Andreas Thoeny "Atmospheric trace gas monitoring by CO₂ laser photoacoustic spectroscopy", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140180

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