光谱学与光谱分析 |
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Techniques of On-Line Monitoring Volatile Organic Compounds in Ambient Air with Optical Spectroscopy |
DU Zhen-hui, ZHAI Ya-qiong, LI Jin-yi, HU Bo |
State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China |
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Abstract Volatile organic compounds (VOCs) are harmful gaseous pollutants in the ambient air. The techniques of on-line monitoring VOCs are very significant for environment protection. Until now, there is no single technology that can meet all the needs of monitoring various VOCs. The characteristics and present situation of several optical methods, which can be applied to on-line monitoring VOCs, including non dispersive infrared (NDIR), Fourier transform infrared (FTIR) spectroscopy, differential optical absorption spectroscopy (DOAS), and laser spectroscopy were reviewed. Comparison was completed between the national standard methods and spectroscopic method for measuring VOCs. The main analysis was focused on the status and trends of tuning diode laser absorption spectroscopy (TDLAS) technology.
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Received: 2009-05-06
Accepted: 2009-08-08
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Corresponding Authors:
DU Zhen-hui
E-mail: duzhenhui@tju.edu.cn
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