Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption

doi:10.1088/1674-1056/21/9/090701

中国物理B ›› 2012, Vol. 21 ›› Issue (9): 90701-090701.doi: 10.1088/1674-1056/21/9/090701

Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption

孙友文^a, 曾议^a, 刘文清^a, 谢品华^a, 陈嘉乐^b, 李先欣^a, 汪世美^a, 黄书华^a

a Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
b School of Energy and Environment, City University of Hong Kong, Hong Kong, China

收稿日期:2011-12-07 修回日期:2012-02-21 出版日期:2012-08-01 发布日期:2012-08-01
基金资助:
Project supported by the National High Technology Research and Development Program of China (Grant No. 2009AA063006), the National Natural Science Foundation of China (Grant No. 40805015), and the Excellent Youth Scientific Foundation of Anhui Province, China (Grant No. 10040606Y28).

Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption

Sun You-Wen (孙友文)^a, Zeng Yi (曾议)^a, Liu Wen-Qing (刘文清)^a, Xie Pin-Hua (谢品华)^a, Chan Ka-Lok (陈嘉乐)^b, Li Xian-Xin (李先欣)^a, Wang Shi-Mei (汪世美)^a, Huang Shu-Hua (黄书华)^a

a Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
b School of Energy and Environment, City University of Hong Kong, Hong Kong, China

Received:2011-12-07 Revised:2012-02-21 Online:2012-08-01 Published:2012-08-01
Contact: Liu Wen-Qing E-mail:wqliu@aiofm.ac.cn
Supported by:
Project supported by the National High Technology Research and Development Program of China (Grant No. 2009AA063006), the National Natural Science Foundation of China (Grant No. 40805015), and the Excellent Youth Scientific Foundation of Anhui Province, China (Grant No. 10040606Y28).

摘要/Abstract

摘要： In this paper, we present the simultaneous multiple pollutant gases (CO₂, CO, and NO) measurements by using the non-dispersive infrared (NDIR) technique. A cross-correlation correction method is proposed and used to correct the cross-interferences among the target gases. The calculation of calibration curves is based on least-square fittings with third-order polynomials, and the interference functions are approximated by linear curves. The pure absorbance of each gas is obtained by solving three simultaneous equations using the fitted interference functions. Through the interference correction, the signal created at each filter channel only depends on the absorption of the intended gas. Gas mixture samples with different concentrations of CO₂, CO, and NO are pumped into the sample cell for analysis. The results show that the measurement error of each gas is less than 4.5%.

关键词: environmental pollution measurements, optical measurement technology, non-dispersive infrared technique, gas analysis

Abstract: In this paper, we present the simultaneous multiple pollutant gases (CO₂, CO, and NO) measurements by using the non-dispersive infrared (NDIR) technique. A cross-correlation correction method is proposed and used to correct the cross-interferences among the target gases. The calculation of calibration curves is based on least-square fittings with third-order polynomials, and the interference functions are approximated by linear curves. The pure absorbance of each gas is obtained by solving three simultaneous equations using the fitted interference functions. Through the interference correction, the signal created at each filter channel only depends on the absorption of the intended gas. Gas mixture samples with different concentrations of CO₂, CO, and NO are pumped into the sample cell for analysis. The results show that the measurement error of each gas is less than 4.5%.

Key words: environmental pollution measurements, optical measurement technology, non-dispersive infrared technique, gas analysis

中图分类号: (Instruments for environmental pollution measurements)

07.88.+y

42.87.-d (Optical testing techniques) 42.72.Ai (Infrared sources) 33.20.Ea (Infrared spectra)

孙友文, 曾议, 刘文清, 谢品华, 陈嘉乐, 李先欣, 汪世美, 黄书华. Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption[J]. 中国物理B, 2012, 21(9): 90701-090701.

Sun You-Wen (孙友文), Zeng Yi (曾议), Liu Wen-Qing (刘文清), Xie Pin-Hua (谢品华), Chan Ka-Lok (陈嘉乐), Li Xian-Xin (李先欣), Wang Shi-Mei (汪世美), Huang Shu-Hua (黄书华). Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption[J]. Chin. Phys. B, 2012, 21(9): 90701-090701.

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Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption

Cross-interference correction and simultaneous multi-gas analysis based on infrared absorption

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