CO的第二泛频(3←0)跃迁谱线线形强度测量研究

doi:10.3969/j.issn.1000-1158.2020.12.19

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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 293K and pressures of 13~93kPa by using a frequency-stable optical cavity ring-down device with 200μmol/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%.

Key words： metrology carbon monoxide concentration cavity ring-down spectroscopy line intensities air pollution monitoring

Received: 16 March 2020 Published: 08 December 2020

PACS:	TB99
	TB96

Fund:;The National Natural Science Foundation of China

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	Articles by authors
	PAN Jin-ming
	LIN Hong
	FENG Xiao-juan
	HUAN Ke-wei
	ZHANG Jin-tao

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PAN Jin-ming,LIN Hong,FENG Xiao-juan, et al. Investigation on the Line Intensity Measurement of the Second Overtone (3←0) Band of CO[J]. Acta Metrologica Sinica, 2020, 41(12): 1565-1569.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.12.19 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I12/1565

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