HR: 1340h
AN: A53B-1149    [Abstracts]
TI: Occurrence of Organohalides in Snow and Air in Alert, Nunavut (2006)
AU: * Kos, G
EM: gkos@alcor.concordia.ca
AF: McGill University, Department of Chemistry, 805 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
AU: Ariya, P A
EM: parisa.ariya@mcgill.ca
AF: McGill University, Department of Chemistry, 805 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
AU: Ariya, P A
EM: parisa.ariya@mcgill.ca
AF: McGill University, Department of Atmospheric and Oceanic Sciences, 801 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
AB: We investigated concentrations of organohalides in Alert during a 3 week sampling campaign in spring 2006. In order to investigate the occurrence of species in the atmosphere and the snow pack, we have collected airsamples in electropolished canisters and snow samples by grab sampling including several depth profiles. Model compounds analysed on site from snow samples using gas chromatography and flame ionisation detection system (SPME-GC/FID) included chloroform, trichloroethene, dibromomethane, 1-chloro-2- bromopropane, dibromochloroethane, chlorobenzene, bromoform, 1,2,4-trichlorobenzene and 1,2- dichlorobenzene. Sample preparation was carried out using solid-phase microextraction (SPME). Air samples were analysed in the lab in Montreal using a cold-trap system for analyte preconcentration and a GC/FID system for analysis. We would like to discuss the implication of these results for snow-atmosphere exchange processes.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting