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目的：由于使用含铅汽油，仅１９９６年上海汽车尾气中铅排放量达１２３吨。我国已于１９９７年全面推广使用无铅汽油，无铅汽油的生产不是简单的取代四乙基铅，汽油组分的改变，必然导致尾气的变化，为了评估当前无铅汽油的使用对尾气排放颗粒有机提取物的遗传毒性影响，采用
Purpose: Due to the use of leaded gasoline, only 123 tonnes of lead was emitted from Shanghai’s automobile exhaust in 1996. China has fully promoted the use of unleaded petrol in 1997. The production of unleaded petrol is not a simple replacement of tetraethyl lead. The change of petrol composition will inevitably lead to the change of tail gas. In order to evaluate the current use of unleaded petrol, The genetic toxicity of organic extracts is influenced by