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Qualitative and quantitative analysis of atmospheric methanol using a continuous-wave terahertz spectrometer

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Abstract

We present a specific-window method to subtract the interference of water vapor on terahertz frequency-domain spectroscopy (THz-FDS) at ambient temperature and pressure. A continuous-wave spectrometer based on photomixing was utilized to obtain THz-FDS of methanol vapor in the range of 50–1200 GHz. The distinctly spaced absorption features in the neighborhood of atmospheric windows of transparency were selected to perform linear fitting versus the calculated absorption cross section and obtain the concentration of methanol. Furthermore, the gradually decreased methanol vapor was quantified to demonstrate the reliability of the method.

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DOI:10.3788/col201816.103001

所属栏目:Spectroscopy

基金项目:This work was supported by the China Postdoctoral Science Foundation (No. 2017M610771).

收稿日期:2018-07-09

录用日期:2018-08-30

网络出版日期:2018-09-20

作者单位    点击查看

Han Zhang:School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaBeijing Engineering Research Center of Industrial Spectrum Imaging, Beijing 100083, China
Zhaohui Zhang:Beijing Engineering Research Center of Industrial Spectrum Imaging, Beijing 100083, ChinaSchool of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xiaoyan Zhao:School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xiaotong Zhang:School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China
Tianyao Zhang:School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Can Cao:School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Yang Yu:School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China

联系人作者:Zhaohui Zhang(zhangzhaohui@ustb.edu.cn)

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引用该论文

Han Zhang, Zhaohui Zhang, Xiaoyan Zhao, Xiaotong Zhang, Tianyao Zhang, Can Cao, Yang Yu, "Qualitative and quantitative analysis of atmospheric methanol using a continuous-wave terahertz spectrometer," Chinese Optics Letters 16(10), 103001 (2018)

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