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

Autor: Salvatore Iannotta, A. Rossi, Davide Bassi, Roberto Buffa, Andrea Boschetti, M. Scotoni
Rok vydání: 2005
Předmět:
Zdroj: Applied physics. B, Lasers and optics
82 (2006): 495–500. doi:10.1007/s00340-005-2077-x
info:cnr-pdr/source/autori:Scotoni M. a; Rossi A. b; Bassi D. a; Buffa R. b; Iannotta S. c; Boschetti A. c/titolo:Simultaneous detection of ammonia, methane and ethylene at 1.63 mu m with diode laser photoacoustic spectroscopy./doi:10.1007%2Fs00340-005-2077-x/rivista:Applied physics. B, Lasers and optics (Print)/anno:2006/pagina_da:495/pagina_a:500/intervallo_pagine:495–500/volume:82
ISSN: 1432-0649
0946-2171
DOI: 10.1007/s00340-005-2077-x
Popis: Spectral investigation around 6115 cm-1 for simultaneous detection of ammonia, methane and ethylene in gas samples is presented. Experimental data on the ?2+?3+?4 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.
Databáze: OpenAIRE
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