Sorbent Tube Sampling and an Automated Thermal Desorption System for Halocarbon Analysis

Development and deployment of the analytical system, ATD-GC-ECD has been established to monitor a suite of halogenated compounds found in the atmosphere at trace concentrations. The instrument has been used to monitor urban back ground emission flux levels in Bristol, UK as well as Yellow stone Nati...

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Bibliographic Details
Published in:TAO : Terrestrial, atmospheric, and oceanic sciences atmospheric, and oceanic sciences, 2009-04, Vol.20 (2), p.345
Main Authors: Khan, Md. Anwar Hossain, Mead, Mohammed Iqbal, Nickless, Graham, Martin, Damien, Shallcross, Dudley Edmund
Format: Article
Language:English
Subjects:
Automated Thermal Desorption (ATD)
Automation
Deployment
Desorption
Electron Capture Detector (ECD)
Field tests
Gas Chro matography (GC)
Halocarbons
Halogenated compounds
National parks
Ozone
Ozone depletion
Pre-sampling unit
Rainforests
Reproducibility
Sampling
Sorbenttube
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Summary:Development and deployment of the analytical system, ATD-GC-ECD has been established to monitor a suite of halogenated compounds found in the atmosphere at trace concentrations. The instrument has been used to monitor urban back ground emission flux levels in Bristol, UK as well as Yellow stone National Park, USA and an in door rain forest (Wild Walk@Bristol, UK). The newly established sorbent tube sampling system is small and easily portable and has been used for large volume sample collection from remote areas. Automated Thermal Desorption (ATD) provides routine atmospheric measurements without cryogenic pre-concentration. The instrument provides good precision where the detection limit was ≤ pptv for the species of interest and the reproducibility was within 4% for all of the selected halocarbons. The results from two field experiments have also provided insight about natural missing sources of some ozone depleting halocarbons.
ISSN:1017-0839
2311-7680
DOI:10.3319/TAO.2008.02.15.01(A)