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The reaction between NO(3) and dimethylsulphide (DMS) in air has been studied in a 480 l reaction chamber. Intermediates and end products were identified by FT-IR and ion chromatography. HNO(3), CH(2)O, SO(2) and methanesulphonic acid were found to be the main products of the reaction, with methanesulphonic acid as the most abundant sulphur compound. Organic peroxynitrates and CH(3)SNO(2) have been identified as intermediates from their characteristic spectral features. Based on the results obtained, a mechanism for the reaction DMS + NO(3) is proposed, which has hydrogen abstraction as the first step. The formation of HNO(3), followed by removal of HNO(3) by deposition, may represent an efficient night-time sink of NO(x) in the marine troposphere.

Additional information

Authors: JENSEN N R, JRC Ispra (IT);HJORTH J, JRC Ispra (IT);LOHSE C, JRC Ispra (IT);SKOV H, JRC Ispra (IT);RESTELLI G, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Conference on the Generation of Oxidants on Regional and Global Scale, Norwich (GB), July 3-7, 1989
Availability: Available from (1) as Paper EN 34900 ORA
Record Number: 199111324 / Last updated on: 1994-12-02
Original language: en
Available languages: en