Measurements of carbon monoxide mixing ratios in Houston using a compact high-power CW DFB-QCL-based QEPAS sensor

Measurements of carbon monoxide (CO) mixing ratios in Houston, Texas, during the period from May 16, 2013 to May 28, 2013 were performed using a sensitive, selective, compact, and portable quartz-enhanced photoacoustic spectroscopy (QEPAS)-based CO sensor employing a high-power continuous wave (CW)...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2014-11, Vol.117 (2), p.519-526
Main Authors: Stefański, Przemysław, Lewicki, Rafał, Sanchez, Nancy P., Tarka, Jan, Griffin, Robert J., Razeghi, Manijeh, Tittel, Frank K.
Format: Article
Language:English
Subjects:
Carbon monoxide
Continuous wave
Engineering
Feedback
Lasers
Mixing ratios
Optical Devices
Optics
Photoacoustic spectroscopy
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Portability
Quantum Optics
Sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Measurements of carbon monoxide (CO) mixing ratios in Houston, Texas, during the period from May 16, 2013 to May 28, 2013 were performed using a sensitive, selective, compact, and portable quartz-enhanced photoacoustic spectroscopy (QEPAS)-based CO sensor employing a high-power continuous wave (CW) distributed feedback quantum cascade laser (DFB-QCL). The minimum detectable CO concentration was 3 ppbv for the strong, interference-free R(6) absorption line at 2,169.2 cm −1 and a 5 s data acquisition time. The average CO concentration during the measurement period was 299.1 ± 81.4 ppb with observed minimum and maximum values of 210.5 and 4,307.9 ppb, respectively. A commercially available electrochemical sensor was employed in-line for simultaneous measurements to confirm the response of the CW DFB-QCL-based QEPAS sensor to variations of the CO mixing ratios. Moderate agreement ( R 2  = 0.7) was found between both sets of CO measurements.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-014-5863-5