Detection of atmospheric trace gas species by DOAS gas-analyzer

Pavel P. Geiko; Sergey S. Smirnov; Ignatii V. Samokhvalov

doi:10.1117/12.2075125

25 November 2014 Detection of atmospheric trace gas species by DOAS gas-analyzer

Pavel P. Geiko, Sergey S. Smirnov, Ignatii V. Samokhvalov

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.

Citation Download Citation

Pavel P. Geiko, Sergey S. Smirnov, and 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); https://doi.org/10.1117/12.2075125

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