H2S detection by tunable diode laser absorption spectroscopy
Hydrocarbon Sulfide is a highly toxic and flammable gas. It is generated as a common by-product of many industrial processes. Early detection of H2S at concentrations of 10ppm in air is essential to prevent its toxic influence at higher concentrations. Tunable diode Laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. Their characteristics like non-intrusive, high selectivity, high sensitivity, and fast response time make them more appealing than conventional point sensors for a reliable H2S detection. A long open-path H2S sensor based on tunable diode laser absorption spectroscopy has been developed, using telecommunication near infrared distributed feed-back(DFB) tunable diode laser combining with wavelength modulation spectroscopy technology, a detection limit of 20ppm·m has been demonstrated, an on-board reference cell provides on-line sensor calibration. The sensor is very suitable for large area field H2S monitoring application.
Hydrocarbon Sulfide (H2S) Tunable diode laser absorption spectroscopy wavelength modulation spectroscopy Open-path
Dong Chen Wenqing Liu Yujun Zhang Jianguo Liu Ruifeng Kan Min Wang Jiuying Chen Yiben Cui
Key Laboratory of Environment Optics and Technology of Chinese Academy of Sciences Anhui Institute of Optics and Fine Mechanics, CAS Hefei 230031 China
国际会议
2006 IEEE International Conference on Information Acquisition
山东威海
英文
754-758
2006-08-20（万方平台首次上网日期，不代表论文的发表时间）