Comparison of optical-feedback cavity-enhanced absorption spectroscopy and gas chromatography for ground-based and airborne measurements of atmospheric CO concentration
We present the first comparison of carbon monoxide (CO) measurements performed with a portable laser spectrometer that exploits the optical-feedback cavity-enhanced absorption spectroscopy (OF-CEAS) technique, against a high-performance automated gas chromatograph (GC) with a mercuric oxide reductio...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
16 May 2017
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| In: |
Atmospheric measurement techniques
Year: 2017, Volume: 10, Issue: 5, Pages: 1803-1812 |
| ISSN: | 1867-8548 |
| DOI: | 10.5194/amt-10-1803-2017 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.5194/amt-10-1803-2017 Verlag, kostenfrei, Volltext: https://www.atmos-meas-tech.net/10/1803/2017/ 
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| Author Notes: | Irène Ventrillard, Irène Xueref-Remy, Martina Schmidt, Camille Yver Kwok, Xavier Faïn, Daniele Romanini |
| Summary: | We present the first comparison of carbon monoxide (CO) measurements performed with a portable laser spectrometer that exploits the optical-feedback cavity-enhanced absorption spectroscopy (OF-CEAS) technique, against a high-performance automated gas chromatograph (GC) with a mercuric oxide reduction gas detector (RGD). First, measurements of atmospheric CO mole fraction were continuously collected in a Paris (France) suburb over 1 week. Both instruments showed an excellent agreement within typically 2<span class="thinspace"></span>ppb (part per billion in volume), fulfilling the World Meteorological Organization (WMO) recommendation for CO inter-laboratory comparison. The compact size and robustness of the OF-CEAS instrument allowed its operation aboard a small aircraft employed for routine tropospheric air analysis over the French Orléans forest area. Direct OF-CEAS real-time CO measurements in tropospheric air were then compared with later analysis of flask samples by the gas chromatograph. Again, a very good agreement was observed. This work establishes that the OF-CEAS laser spectrometer can run unattended at a very high level of sensitivity ( < <span class="thinspace"></span>1<span class="thinspace"></span>ppb) and stability without any periodic calibration.</p> |
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| Item Description: | Gesehen am 24.09.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1867-8548 |
| DOI: | 10.5194/amt-10-1803-2017 |