Open AccessSorbent Tube Sampling and an Automated Thermal Desorption System for Halocarbon Analysis
Author(s) -
M. Anwar H. Khan,
Mohammed Iqbal Mead,
G. Nickless,
Damien Martin,
Dudley E. Shallcross
Publication year - 2009
Publication title -
terrestrial, atmospheric and oceanic sciences/terrestrial, atmospheric, and oceanic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.35
H-Index - 46
eISSN - 2223-8964
pISSN - 1017-0839
DOI - 10.3319/tao.2008.02.15.01(a
Subject(s) - sorbent , halocarbon , tube (container) , thermal desorption , sampling (signal processing) , desorption , chemistry , chromatography , materials science , physics , adsorption , optics , organic chemistry , composite material , detector
Development and deployment of the analytical sys tem, ATD-GC-ECD has been established to monitor a suite of halogenated com pounds 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. Auto mated Thermal Desorption (ATD) provides routine atmospheric measurements with out cryogenic pre-concentration. The instrument provides good precision where the detection limit was _T_n3 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 pro vided insight about natural missing sources of some ozone depleting halocarbons