顶空气相色谱法测定出厂水中 9 种挥发性卤代烃

目的建立顶空气相色谱快速分析出厂水中9种挥发性卤代烃的方法。方法水中的微量卤代烃经顶空提取后，应用HP-5毛细管色谱柱，采用程序升温方式进行GC分析（ECD检测器），以保留时间定性，外标法定量。结果9种挥发性卤代烃平均加标回收率在91．2％～109．5％之间，相对标准偏差为3．4％-8．5％，最低检出浓度为O．03—1．30μg／L。结论所建立的本方法操作简单快速，具有较好的准确度和灵敏度，适用于出厂水中多种挥发性卤代烃的检测分析。

Determination of 9 kinds of volatile halogenated hydrocarbons in tap water by headspace gas chromatography

Objective To establish a method for rapid determination of 9 kinds volatile halogenated hydrocarbons in tap wa- ter with headspace gas chromatographyl （ GC ）. Methods Halogenated alkane hydrocarbon in the water was extracted by headspace technology, then analyzed with HP -5 capillary column. They were determined with GC by controlling the tem- perature. Retention time of the peaks was used for qualitative analysis, while external standard method was used for quanti- tative analysis. Results The recover ies of 9 kinds volatile halogenated hydrocarbons were between 91.2% and 109. 5% . The relative standard deviation （RSD） was 3.4% - 8.5% . The lo west determination limit was 0. 03 - 1.30μg/ L. Conclusion The method is simple , rapid , sensitive and accurate . Therefore, it is suitable for analysis of multi - mixture volatile halogenated hydrocarbons in tap water.