HR: 0800h
AN: A11B-0053    [Abstracts]
TI: Determination of Volatile Organic Compounds in Snow Using Solid Phase Micro Extraction (SPME)
AU: * Kos, G
EM: gregor.kos@mcgill.ca
AF: Department of Atmospheric and Oceanic Sciences, McGill University, 805 Sherbrooke Street West, Montreal, QC H3A 2K6 Canada
AU: Ariya, P A
EM: parisa.ariya@mcgill.ca
AF: Department of Atmospheric and Oceanic Sciences, McGill University, 805 Sherbrooke Street West, Montreal, QC H3A 2K6 Canada
AU: Ariya, P A
EM: parisa.ariya@mcgill.ca
AF: Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 2K6 Canada
AB: Volatile organic compounds (VOC) in snow-samples from different environments were determined. Samples were collected in Resolute, Nunavut in the high Arctic (latitude: 74.70$\deg$/longitude: - 94.91$\deg$), the Gasp‚ Peninsula in Quebec (at Mont Albert near Ste-Anne-des Monts: 49.12$\deg$/- 66.49$\deg$) and downtown Montreal, Quebec ( 45.54$\deg$/- 73.60$\deg$) in order to reflect different degrees of anthropogenic influence. In order to assess the ability of compounds contained in the sample to perform photochemistry, samples were irradiated with UV-light in the 300-400 nm range. Filtering through a 0.2 $\mu$m-filter provided information about compounds primarily associated with the liquid phase. A solid phase micro extraction (SPME) procedure was developed for sample preparation and VOC were identified using gas chromatography with mass spectrometric detection (GC-MS). We will present our results at several urban and remote sites, and the implication of the result to atmospheric chemistry will be discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 0368 Troposphere--constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting