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Simultaneous detection of ammonia, methane and ethylene at 1.63 μm with diode laser photoacoustic spectroscopy

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Abstract

Spectral investigation around 6115 cm-1 for simultaneous detection of ammonia, methane and ethylene in gas samples is presented. Experimental data on the ν2+ν3+ν4 combination band of ammonia are reported with a resolution of 1.5 GHz. A trace gas analyzer based on a resonant photoacoustic cell and an external cavity diode laser has been used for detection. A data fitting procedure has been developed in order to improve the system sensitivity and to limit the need of a reference cell. The selected spectral region allows a sensitivity of about 60 ppm for ammonia, 6 ppm for methane and 30 ppm for ethylene with 0.3 mW laser power. An application of simultaneous detection of such molecules in a mixture reproducing their typical abundances in real gas samples from biomass gasification is discussed.

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Authors and Affiliations

  1. Dipartimento di Fisica, Università di Trento, 38050, Povo-Trento, Italy

    M. Scotoni & D. Bassi

  2. Dipartimento di Fisica, Università di Siena, 53100, Siena, Italy

    A. Rossi & R. Buffa

  3. CNR-ITC Sezione di Trento, Istituto di Fotonica e Nanotecnologie, 38050, Povo-Trento, Italy

    S. Iannotta & A. Boschetti

Authors
  1. M. Scotoni
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  2. A. Rossi
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  3. D. Bassi
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  4. R. Buffa
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  5. S. Iannotta
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  6. A. Boschetti
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Corresponding author

Correspondence to M. Scotoni.

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PACS

42.62.Fi; 42.55.Px; 82.80.Ch

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Scotoni, M., Rossi, A., Bassi, D. et al. Simultaneous detection of ammonia, methane and ethylene at 1.63 μm with diode laser photoacoustic spectroscopy. Appl. Phys. B 82, 495–500 (2006). https://doi.org/10.1007/s00340-005-2077-x

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  • DOI: https://doi.org/10.1007/s00340-005-2077-x

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