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Two high-speed, portable GC systems designed for the measurement of non-methane hydrocarbons and PAN: Results from the Jungfraujoch High Altitude Observatory

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Journal of Environmental Monitoring Vol -2

Two high-speed, portable GC systems designed for the measurement of non-methane hydrocarbons and PAN: Results from the Jungfraujoch High Altitude Observatory

Content Provider	Royal Society of Chemistry (RSC)
Author	Stemmler, K. Zellweger, C. Lewis, A. C. Whalley, L. K. Ridgeon, P. Purvis, R. M. McQuaid, J. B. Lee, J. D.
Copyright Year	2004
Abstract	Near real-time measurements of light non-methane hydrocarbons (NMHCs) and peroxyacetyl nitrate (PAN) have been performed in the free troposphere using two fast gas chromatography (GC) instruments designed for use on aircraft. A GC-helium ionisation detector (HID) system measured 15 C2–C5 hydrocarbons with 5 min time resolution and a dual channel GC-Electron Capture Detector (ECD) measured PAN with 90 s resolution. Both instruments had low parts per trillion by volume (pptV) detection limits and ran continuously at the remote Jungfraujoch (JFJ) research station in the Swiss Alps (46.55°N, 7.98°E), 3580 m above mean sea level (AMSL), during February/March 2003. Carbon monoxide, ozone, nitrogen oxide and nitrogen dioxide and all odd nitrogen species (NOy) were also measured continuously. Hydrocarbons and CO were strongly correlated in all air-masses whilst PAN exhibited both positive and negative correlations with respect to O3, dependent on age and origin of the air-mass sampled. PAN was found to contribute ∼20% to the NOy sampled on average. The experiment, as well as providing interesting datasets from this remote location, also demonstrated that when optimised, GC techniques have the potential to measure at a time resolution significantly greater than is traditionally considered, with high sensitivity and low uncertainty.
Starting Page	234
Ending Page	241
Page Count	8
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	6
Issue Number	3
Journal	Journal of Environmental Monitoring
DOI	10.1039/b310022g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Real-time computing Volatile organic compound Peroxyacetyl nitrate Gas chromatography Jungfraujoch Swiss Alps Metres above sea level Carbon monoxide Ozone Nitrogen oxide Nitrogen dioxide
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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