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28 January 2009 Trace H2S monitoring based on off-axis integrated cavity output spectroscopy
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The trace H2S in range of 0-20ppm has been measured by means of off-axis integrated cavity output spectroscopy (OA-ICOS) technology combined with tunable diode laser absorption spectroscopy (TDLAS) technology. The instrument uses off-axis alignment geometry to eliminate the problem of mode matching between laser and optical resonant cavity, in absenting the piezoelectric transducer. Combined with the high sensitivity of the TDLAS technology, sensitivity of the instrument is improved. The repeatability of instrument in H2S measurement achieves to 0.303ppm (3σ), linearity less than ±1% F.S., which meet the requirement of trace H2S measurement in petrochemical or natural gas industry.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dahai Yu, Xia Li, Haitao Gu, Xiumin Gao, Wei Huang, Yu Zhang, Haibo Ma, Zhiwei Ma, Pingbo Gao, Wenmin Zhen, Ying Li, Yu Qi, Luhong Wen, and Jian Wang "Trace H2S monitoring based on off-axis integrated cavity output spectroscopy", Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 715627 (28 January 2009);

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