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Kinetics and products of the gas phase oxidation of dimethylsulphoxide (DMSO) and dimethylsulphone (DMSO2), two sulphur compounds produced in the gas phase oxidation of dimethylsulphide, have been investigated. The reactions of the DMSO and DMSO2 with some of the most important oxidizing species in the atmosphere were investigated, which include reactions with OH and NO(3) radicals, C1 atoms and ozone (O3). The experiments were caried out at room temperature and at Torr in a 480 L reaction chamber. FT-IR spectrometry was used as the analytical technique. Using a relative rate reaction technique or a pseudo first order reaction rate technique. The results obtained indicated that in the atmosphere DMSO could be oxidized both by the gas phase reaction with the OH radical leading to SO(2) and DMSO(2), and by transfer to the liquid phase, where the oxidation products are unknown. DMSO(2) on the other hand will mainly be transferred to the liquid phase before undergoing further oxidation.

Additional information

Authors: FALBE-HANSEN H, Environment Institute, Ispra (IT);JENSEN N R, Environment Institute, Ispra (IT);HJORTH J, Environment Institute, Ispra (IT);SORENSEN S, University of Odense (DK);PEDERSEN T, University of Copenhagen (DK)
Bibliographic Reference: Article: Atmospheric Environment, 1998
Record Number: 199910708 / Last updated on: 1999-05-14
Original language: en
Available languages: en