中文摘要：

建立了超声辅助萃取（UAE）-分散液液微萃取（DLLME）/气相色谱法测定环境水样中六氯苯、林丹和硫丹,并对影响萃取和富集效率的因素进行了优化。在最优条件下,六氯苯、林丹及α-硫丹的线性范围为1.0-1 000μg/L,检出限分别为0.47、0.39及0.63μg/L;β-硫丹线性范围为5.0-1 000μg/L,检出限为2.44μg/L;相对标准偏差（RSDs）为8.3%-11.7%（n=7）。用该方法对环境水样中的六氯苯、林丹及硫丹进行了分析,自来水、灌溉水、湖水样的平加标回收率分别为94.2%-100.4%、89.4%-99.4%和69.6%-96.3%。

英文摘要：

A simple and rapid method based on ultrasound-assisted extraction（UAE）and dispersive liquid-liquid microextraction（DLLME）coupled with gas chromatography-electron capture detector（GC-μECD）was established for the analysis of hexachlorobenzene,lindane and endosulfan in environmental water.The parameters,which might influence extraction efficiency,such as the type and volume of extraction solvents and disperser solvents,extraction time,pH and salt effect,were studied and optimized.Under the optimal conditions,the good linearity was obtained in the range of 1.0-1000μg/L forα-endosulfan,lindane and hexachlorobenzene,and 5.0-1000μg/L forβ-endosulfan,respectively.Limits of detection ranged between 0.39 and 2.44μg/L,and the relative standard deviations（RSDs）for the concentration of hexachlorobenzene,lindane and endosulfan were in the range of 8.3%-11.7%.The recoveries of spiked standards at different levels in tap water,irrigation water and lake water samples ranged from 94.2%to 100.4%,from 89.4%to 99.4%and from 69.6%to 96.3%,respeetively.