J. Phys. IV France 107 (2003) 1119
Kinetics and products study of the reaction of BrO radicals with gaseous mercuryF. Raofie and P.A. Ariya
Departments of Chemistry and Atmospheric and Oceanic Sciences, McGill University, Montréal, Québec H3A 2K6, Canada
Bro reactions of elemental mercury was as a major candidate for near complete depletion of elemental mercury in polar region. The kinetics of the reaction between BrO radicals with gaseous mercury was identified using relative rate method by Gas Chromatography with Mass spectroscopic Detection (GC-MS) at room temperature ( K) and at atmospheric pressure Torr in the N2 diluent. Propane, DMS and butane were used as reference molecules. The upper and lower limits rate constant for reaction of with BrO was estimated to be and cm 3 molecules -1 s -1, respectively. BrO radicals were produced from the photolysis of bromine and dibromomethane in presence of ozone and detected by MS at or 97. Ozone was produced in a Silent discharged generator. Reaction products were identified using direct mass spectrometer with chemical ionization ion source.
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