An on-line monitoring technique for trace gases in atmosphere based on differential optical absorption spectroscopy

L. Q. Sun; K. X. Cheng; H. D. Yang; Q. S. He

doi:10.1117/12.2021110

22 June 2013 An on-line monitoring technique for trace gases in atmosphere based on differential optical absorption spectroscopy

L. Q. Sun, K. X. Cheng, H. D. Yang, Q. S. He

Author Affiliations +

Proceedings Volume 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 87692Z (2013) https://doi.org/10.1117/12.2021110
Event: International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 2013, Singapore, Singapore

Abstract

Differential optical absorption spectroscopy (DOAS) has become a widely used method to measure trace gases in the atmosphere. The concentrations of trace gases can be retrieved by fitting differential absorption spectra with standard differential absorption cross-section using the linear least-square method. The basic principle of DOAS is introduced. The construction of DOAS on-line monitoring system is designed and the retrieval method of trace gases concentration based on the principle of least-squares is discussed. The properties of DOAS system are tested by experiments. The advantages of DOAS system used in atmosphere quality monitoring are shown.

Citation Download Citation

L. Q. Sun, K. X. Cheng, H. D. Yang, and Q. S. He "An on-line monitoring technique for trace gases in atmosphere based on differential optical absorption spectroscopy", Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87692Z (22 June 2013); https://doi.org/10.1117/12.2021110

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