Applied Physics B

, Volume 82, Issue 3, pp 495–500

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

  • M. Scotoni
  • A. Rossi
  • D. Bassi
  • R. Buffa
  • S. Iannotta
  • A. Boschetti
Article

DOI: 10.1007/s00340-005-2077-x

Cite this article as:
Scotoni, M., Rossi, A., Bassi, D. et al. Appl. Phys. B (2006) 82: 495. doi:10.1007/s00340-005-2077-x

Abstract

Spectral investigation around 6115 cm-1 for simultaneous detection of ammonia, methane and ethylene in gas samples is presented. Experimental data on the ν234 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.

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • M. Scotoni
    • 1
  • A. Rossi
    • 2
  • D. Bassi
    • 1
  • R. Buffa
    • 2
  • S. Iannotta
    • 3
  • A. Boschetti
    • 3
  1. 1.Dipartimento di FisicaUniversità di TrentoPovo-TrentoItaly
  2. 2.Dipartimento di FisicaUniversità di SienaSienaItaly
  3. 3.CNR-ITC Sezione di TrentoIstituto di Fotonica e NanotecnologiePovo-TrentoItaly