中文摘要：

利用激光闪光光解技术研究了液相二甲基硫（DMS）与OH·，NO3·和SO·4^-自由基的微观反应机理．实验结果表明：在pH5～9时，OH·氧化DMS生成DMSOH·，DMSOH·会与DMS反应生成（DMS）2^＋；而NO3·和SO·4^-会直接氧化DMS生成DMS^＋，生成的DMS^＋会与DMS反应生成（DMS）2^＋．（DMS）2^＋与氧气的反应很慢。它的衰减受pH影响较大．

英文摘要：

The laser flash photolysis technique was employed to study the reactions of dimethylsulfide （DMS） with OH·, NO3· and SO4^·- radicals in solution. During pH 5-9, OH· reacted with DMS to form DMSOH· radical, which then reacted with another DMS molecule to form （DMS）2^＋, however, the oxidation by NO3· and SO4^·- radicals proceeded via one-electron oxidation to form DMS^＋, which could also react with another DMS molecule to form （DMS）2^＋. The decay of （DMS）2^＋ ion was greatly influenced by the pH and its reaction with oxygen was immeasurably slow.