12 February 1993 Atmospheric trace gas monitoring by CO2 laser photoacoustic spectroscopy
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Markus W. Sigrist, Andreas Thoeny, "Atmospheric trace gas monitoring by CO2 laser photoacoustic spectroscopy", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); doi: 10.1117/12.140180; https://doi.org/10.1117/12.140180
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