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1 February 2019 Simultaneous dual gas QEPAS sensing of water and methane/nitrous oxide
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Simultaneous detection of different trace gases is an important topic in many applications, such as breath analysis, environmental monitoring and oil exploration. Quartz-enhanced photoacoustic spectroscopy offers a good solution of this problem, due to the possibility to operate the quartz resonators at the fundamental and overtone resonance frequencies by simultaneously exciting two different antinodes with two different laser sources. In this work we employed a custom spectrophone coupled with a diode laser and a quantum cascade laser for simultaneous detection of water vapor and methane/nitrous oxide with minimum detection limits in the ppb range.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Sampaolo, P. Patimisco, M. Giglio, G. Menduni, A. Elefante, V. Passaro, F. K. Tittel, and V. Spagnolo "Simultaneous dual gas QEPAS sensing of water and methane/nitrous oxide ", Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI, 109262L (1 February 2019);

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