Journal of Atmospheric and Environmental Optics, Volume. 7, Issue 6, 421(2012)
Application of Quartz-Enhanced Photoacoustic Spectroscopy in Purity Analysis
A compact gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) was developed for trace methane quantification in impure hydrogen. The sensor is equipped with a microresonator to confine the sound wave and enhance QEPAS signal. The normalized noise-equivalent absorption coefficients (1 σ) of 2.45×10-8cm-1 W/Hz1/2 for CH4 detection at 27 kPa were demonstrated with the QEPAS sensor configuration, which corresponds to the detection sensitivity of 3.2 ppm (1 s averaging time).
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DONG Lei, WU Hong-peng, ZHANG Xiang, MA Wei-guang, ZHANG Lei, YIN Wang-bao, JIA Suo-tang. Application of Quartz-Enhanced Photoacoustic Spectroscopy in Purity Analysis[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(6): 421
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Received: Jul. 4, 2012
Accepted: --
Published Online: Nov. 29, 2012
The Author Email: Lei DONG (donglei@sxu.edu.cn)