| 光谱学与光谱分析 |
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| Application of NIR Spectroscopy to Multiple Gas Components Identification |
| QI Ru-bin, YIN Xin, YANG Li, DU Zhen-hui*, LIU Jin, XU Ke-xin |
| State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China |
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Abstract Multiple gas components monitoring in situ by near infrared (NIR) spectroscopy is of great significance in the environmental monitoring. In the present paper, the apectral characteristics of the three types of the volatile organic compounds(VOCs)-propane, propylene and methylbenzene were analyzed, the linear relationship of propylene between concentration and absorbance was considered, and the NIR spectra from 1 620 to 1 750 nm including the characteristic absorption of the three VOCs were acquired, A linear regression model of chemical metrology was created by partial least-squares method and it predicted the concentration of propane and isobutene in the validation set. The results of the experiment indicated that NIR spectroscopy could easily, accurately and quantitatively determine the content of the multiple gas components, and can be used for monitoring the multiple components of the VOCs in situ.
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Received: 2007-05-10
Accepted: 2007-08-20
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Corresponding Authors:
YANG Li, DU Zhen-hui
E-mail: duzhenhui@tju.edu.cn
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