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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%。
The determination of hexachlorobenzene, lindane and endosulfan in environmental water samples by UAE - liquid chromatography coupled dispersive liquid extraction (DLLME) / gas chromatography was studied and the factors that affected the extraction and enrichment efficiency were optimized. Under the optimum conditions, the linear range of hexachlorobenzene, lindane and α-endosulfan was 1.0-1000 μg / L with the detection limits of 0.47, 0.39 and 0.63 μg / L, respectively. The linear range of β-endosulfan was 5.0 ~ The detection limit was 2.44 μg / L with relative standard deviations (RSDs) of 8.3% ~ 11.7% (n = 7). The method was applied to the determination of HCB, lindane and endosulfan in environmental water samples. The spiked recoveries for tap water, irrigation water and lake water were 94.2% -100.4%, 89.4% -99.4% and 69.6% respectively, ~ 96.3%.