鉴于生产中的出厂水为氯化消毒水，可以认为生物流化床预处理对降低饮用水的致突变活性有明显作用。

Since most of the tap water in China was chlorinated, it could be concluded that biopretreatment had a significant effect on reducing the mutagenic activity of drinking water.

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用固相萃取的方法对样品进行预处理，再进行GC - MS分析测定，对饮用水源水中的痕量半挥发性有机化合物进行了测定，并对结果进行了讨论。

This paper described the fact that we pre-process sample by SPE, then Semi-volatile Organic compounds in drink source water were analyzed by GC-MS method, the result was discussed.

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