Laser & Optoelectronics Progress, Volume. 57, Issue 23, 233004(2020)
Analytical Simulation of Ultraviolet Differential Absorption Spectra of Benzene, Toluene, and Xylenes
Differential optical absorption spectroscopy (DOAS) is a spectroscopic measurement technique that uses the narrow-band absorption characteristics of gas molecules to derive gas concentrations. This paper introduces the basic principles of DOAS, and develops a program in MATLAB to analyze DOAS data for benzene, toluene and xylenes (BTX). Moreover, the hypothetical and retrieved values of BTX concentration are compared, and the effects of the change in the incident light intensity and particle parameters on concentration retrieval are studied. Results show that the retrieved values are consistent with the hypothetical values of the BTX concentration, indicating the accuracy of the BTX-DOAS data processing program. Preconditions that cannot be directly deduced theoretically in DOAS are validated using a numerical simulation.
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Xiangru Wang, Xiaoshu Cai, Jun Chen, Wu Zhou. Analytical Simulation of Ultraviolet Differential Absorption Spectra of Benzene, Toluene, and Xylenes[J]. Laser & Optoelectronics Progress, 2020, 57(23): 233004
Category: Spectroscopy
Received: Apr. 24, 2020
Accepted: May. 15, 2020
Published Online: Dec. 7, 2020
The Author Email: Cai Xiaoshu (usst_caixs@163.com)