顶空气相色谱法测定水中三氯甲烷

用氯对饮用水消毒可产生三氯甲烷、三氯乙烯等致癌物质 ,对人体健康有较大危害 ,是水质量的重要指标之一 ,对卤代烃的调查和分析是十分必要的 ,而现有标准无法分开 ,本方法采用顶空气相色谱法 ,电子捕获检测器测定水中三氯甲烷 ,并能与三氯乙烯完全分离。方法的最低检出限为 0 0 0 0 3mg/L ,方法具有灵敏度高等特点。

Trichloromethane and trichloroethene can be produced.When using chlorine to disinfect drinking water.These chemicals do great harm to people and indue cancer.That is a important guide line for water quality nowdays.It is necessary to study and analyze the halides,for these chemicals can not be seperated at present.this paper intorduced the method for determination of Trichlormethane in water by headspace gas chromatagraphy and the content was determined by electron capture detector(ECD).It can be seperated completely from trichlorethene.This method was Sensitive and the detection limit was 0.0003mg/L.