Journal of Atmospheric and Environmental Optics ›› 2012, Vol. ›› Issue (6): 421-426.

• 论文 • Previous Articles     Next Articles

Application of Quartz-enhanced Photoacoustic Spectroscopy in Purity Analysis

DONG Lei, WU Hong-peng, ZHANG Xiang, MA Wei-guang, ZHANG Lei, YIN Wang-bao, JIA Suo-tang   

  1. (Laser Spectroscopy Laboratory of Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006, China)
  • Received:2012-07-04 Revised:2012-08-14 Online:2012-11-28 Published:2012-11-08

Abstract:

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 (1σ) of 2.45×10-8 cm-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).

Key words: quartz-enhanced photoacoustic spectroscopy, gas sensor, purity analysis of hydrogen, quartz tuning fork

CLC Number: