A hydrophobic ionic liquid reverse micelle electromembrane extraction (IL-RM-EME) method based on 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([Bmim][NTf2]) and 1-decyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C10mim][NTf2]) was developed for pretreatment of tetracycline (TC) in environmental water samples in this work. The experimental results indicated that the type of supported liquid membrane (SLM),membrane pore size,voltage,pH of donor/acceptor phase solution and salt content had great influences on the extraction efficiency of tetracycline. Under the optimal conditions of single factors,including using[Bmim][NTf2]ionic liquid SLM components,PC membrane with pore size of 5μm,30 V of voltage,donor phase at pH 2.5,acceptor phase at pH 7.5,and none salt added,the best extraction efficiency of IL-RM-EME to TC of 77.8％ was obtained. This extraction efficiency was much higher than that of neutral (Tween 85-isopropyl alcohol-n-hexane) reverse micelle membrane system (41.4％). Compared with traditional sample pretreatment method,the proposed method had many advantages such as simple operation,less environmental pollution,less reagent consumption and low cost. Moreover,the proposed method showed a good application prospect in detection of environmental organic pollutants.
维普
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