Investigation on the Line Intensity Measurement of the Second Overtone (3←0) Band of CO
PAN Jin-ming1,2,3,LIN Hong2,3,FENG Xiao-juan2,HUAN Ke-wei1,ZHANG Jin-tao2,3
1. College of Science, Changchun University of Science and Technology, Changchun, Jilin 130022, China
2. Division of Thermophysics and Process Measurements, National Institute of Metrology, Beijing 100029, China
3. Division of Process Measurement and Sensors, Zhengzhou Institute of Metrology, Zhengzhou, Henan 450001, China
Abstract：CO molecule is an excellent tracer gas for monitoring air pollution. Accurate and fast measurement of gas concentration is required for real-time monitoring of CO molecule. Gas molecule concentration measurements can be obtained by measuring the absorption spectra and the linear intensity of the spectrum. The CO (3←0) universal spectrum band is a transition band with weak absorption. The absorption spectra of three R branch transition spectra of CO molecule are measured at a temperature of 293K and pressures of 13~93kPa by using a frequency-stable optical cavity ring-down device with 200μmol/mol CO mixture using dry air as buffer gas, and HTP (Hartmann-Tran profile) lines are used to obtain the linear intensity of these lines. The relative standard uncertainty for line intensity measurement is less than 1%, and compared with the international HITRAN, HITEMP and GEISA spectral databases, the relative deviation is less than 4%.
潘金明,林鸿,冯晓娟,宦克为,张金涛. CO的第二泛频(3←0)跃迁谱线线形强度测量研究[J]. 计量学报, 2020, 41(12): 1565-1569.
PAN Jin-ming,LIN Hong,FENG Xiao-juan,HUAN Ke-wei,ZHANG Jin-tao. Investigation on the Line Intensity Measurement of the Second Overtone (3←0) Band of CO. Acta Metrologica Sinica, 2020, 41(12): 1565-1569.
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2020, Vol. 41 
