Isomeric analysis of BTEXs in the atmosphere using β-cyclodextrin capillary chromatography coupled with thermal desorption and mass spectrometry

An analytical method capable of determining trace levels of BTEX-aromatics (benzene, toluene, ethylbenzene, m-, p- and o-xylenes) in the atmosphere with as high resolution as possible has been developed. The method is based on the preconcentration of air samples using a multibed tube (Carbopack C, C...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2006-04, Vol.63 (3), p.502-508
Main Authors: Yassaa, Noureddine, Brancaleoni, Enzo, Frattoni, Massimiliano, Ciccioli, Paolo
Format: Article
Language:English
Subjects:
Adsorption
Air Pollutants - analysis
Air tunnel
Analysis methods
Applied sciences
Atmospheric pollution
Benzene - analysis
Benzene Derivatives - analysis
beta-Cyclodextrins
BTEXs
Chromatography
Cities
Environmental Monitoring - methods
Exact sciences and technology
Gas Chromatography-Mass Spectrometry
GC/MS
Graphitic carbon adsorbents
Isomerism
Italy
Pollution
Thermal desorption
VOCs
β-cyclodextrin capillary chromatography
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Summary:An analytical method capable of determining trace levels of BTEX-aromatics (benzene, toluene, ethylbenzene, m-, p- and o-xylenes) in the atmosphere with as high resolution as possible has been developed. The method is based on the preconcentration of air samples using a multibed tube (Carbopack C, Carbograph 1) at ambient temperature, followed by thermal desorption, and analysis of aromatic species by a β-cyclodextrin capillary chromatography coupled with mass spectrometry. The resolution achieved was sufficient for individual separation of BTEXs as well as m- and p-xylenes. The BTEX-ratios have been determined in an air tunnel and in on-road, suburban and rural forest atmosphere. The ethylbenzene/ m-xylene ratios could provide a deep insight into anthropogenic related NMHC patterns at different locations and under different meteorological conditions and may reflect photochemical processes in the best way.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2005.08.010