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

被引：0
|
作者：
张寒 [1 ,2 ]
张朝晖 [2 ,3 ]
赵小燕 [3 ]
张晓彤 [1 ]
张天尧 [3 ]
曹灿 [3 ]
于洋 [3 ]
机构：
[1] School of Computer and Communication Engineering, University of Science and Technology Beijing
[2] Beijing Engineering Research Center of Industrial Spectrum Imaging
[3] School of Automation and Electrical Engineering, University of Science and Technology Beijing
来源：
Chinese Optics Letters | 2018年 / 16卷 / 10期
基金：
中国博士后科学基金;
关键词：
THz; Qualitative and quantitative analysis of atmospheric methanol using a continuous-wave terahertz spectrometer;
D O I：
暂无
中图分类号：
O657.3 [光化学分析法（光谱分析法）]; X831 [大气监测];
学科分类号：
070302 ; 0706 ; 070602 ; 081704 ;
摘要：
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.
引用
收藏
页码：78 / 82
页数：5
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