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Absorption measurements of ambient methane with tunable diode laser

Kan Rui-Feng Liu Wen-Qing Zhang Yu-Jun Liu Jian-Guo Dong Feng-Zhong Gao Shan-Hu Wang Min Chen Jun

Absorption measurements of ambient methane with tunable diode laser

Kan Rui-Feng, Liu Wen-Qing, Zhang Yu-Jun, Liu Jian-Guo, Dong Feng-Zhong, Gao Shan-Hu, Wang Min, Chen Jun
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Publishing process
  • Received Date:  02 July 2004
  • Accepted Date:  26 November 2004
  • Published Online:  05 February 2005

Absorption measurements of ambient methane with tunable diode laser

  • 1. 中国科学院安徽光学精密机械研究所,合肥 230031

Abstract: Tunable diode laser absorption spectroscopy (TDLAS) is a new trace gas detective method developed with the combination of a diode laser source and a long absorption path. It has the significant advantage not only in sensitivity but also in rapidity of response. The concentration of the ambient methane has been measured using a TDLAS system developed in the laboratory. The system has some advantage s, such as sensitivity, low detective limit (below 0.087mg/m33) an d rapidity of response, and also it is easy to be integrated to a portable apparatus to mon itor the methane concentration in the atmosphere.

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