25 November 2014 Detection of atmospheric trace gas species by DOAS gas-analyzer
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Proceedings Volume 9292, 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 929230 (2014) https://doi.org/10.1117/12.2075125
Event: 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2014, Novosibirsk, Russian Federation
Abstract
A differential optical absorption spectroscopy (DOAS) gas-analyzer was successfully tested. A high pressure 150-W Xe arc lamp was employed as a light source This system consisted of a coaxial telescope, a spectrometer, an analyzer and retroreflector. In order to record the spectra, a monochrometer with a grating and photodiode array was adopted. Gas analyzer spectral data bank includes more than 30 moleculas absorbed in UV spectral region. The measured absorption spectra were evaluated by using a least-squares fit to determine the average mixing ratio of each species in the atmosphere. A number of air pollutants concentrations: SO2, NO2, O3, etc were trace measured. Minimally detected concentration on pathlength 400 m is the unit of ppb at the time of accumulation of 2 min. The results of the field test measurements of pollutants in Tomsk are presented.
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Pavel P. Geiko, Pavel P. Geiko, Sergey S. Smirnov, Sergey S. Smirnov, Ignatii V. Samokhvalov, Ignatii V. Samokhvalov, } "Detection of atmospheric trace gas species by DOAS gas-analyzer ", Proc. SPIE 9292, 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 929230 (25 November 2014); doi: 10.1117/12.2075125; https://doi.org/10.1117/12.2075125
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