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Issue 9, 2014

A compact QCL based methane and nitrous oxide sensor for environmental and medical applications

Author affiliations

Abstract

A methane (CH4) and nitrous oxide (N2O) sensor based on a sensitive, selective and well established technique of quartz enhanced photoacoustic spectroscopy (QEPAS) was developed for environmental and biomedical measurements. A thermoelectrically cooled (TEC) distributed feedback quantum cascade laser (DFB-QCL), capable of continuous wave (CW) mode hop free emission in the 7.83 μm wavelength range, was used as an excitation source. For the targeted CH4 and N2O absorption lines located at 1275.04 cm−1 and 1275.49 cm−1 detection limits (1σ) of 13 ppbv and 6 ppbv were achieved with a 1 second data acquisition time, respectively. Environmental data of CH4 and N2O mixing ratios acquired using the QEPAS sensor system are also reported.

Graphical abstract: A compact QCL based methane and nitrous oxide sensor for environmental and medical applications

Article information


Submitted
30 Jul 2013
Accepted
07 Jan 2014
First published
08 Jan 2014

Analyst, 2014,139, 2065-2069
Article type
Paper

A compact QCL based methane and nitrous oxide sensor for environmental and medical applications

M. Jahjah, W. Ren, P. Stefański, R. Lewicki, J. Zhang, W. Jiang, J. Tarka and F. K. Tittel, Analyst, 2014, 139, 2065 DOI: 10.1039/C3AN01452E

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