中文摘要：本文建立了一种使用新型微萃取技术(LDIL-DLLME)进行样本处理的HPLC-DAD法对水样中四种拟除虫菊酯类杀虫剂（溴氰菊酯、氰戊菊酯、氯菊酯、联苯菊酯）进行快速检测。有机溶剂通常应用于低浓度下的微萃取方法，而本文首次使用离子液体代替有机溶剂进行微萃取。本文利用微量注射器将离子液体放置在微量注射器的长针头处，随着注射器吸取样本溶液而进入注射器内，并在注射器内完成萃取过程。研究结果显示，在最佳条件下，在1-500μg/mL的检测范围内，线性关系良好，相关系数大于0.9994。三个加标水样本回收率均在88.0-102.8%之间，相对标准差在0.3-6.7%之间，四种拟除虫菊酯类杀虫剂的检测限均在0.88-1.71之间，富集因子在242-257之间。本研究为环境样本中拟除虫菊酯类杀虫剂残留检测提供了一种廉价、快速、简单和环保的方法，该方法在实验样品的预处理方面具有较大的应用潜力。
外文摘要：A new microextraction technique named in-syringe low-density ionic liquid dispersive liquid-liquid microextraction (LDIL-DLLME) followed by separation using high performance liquid chromatography has been developed to determine the levels of four pyrethroid insecticides (i.e., deltamethrin, fenvalerate, permethrin, and bifenthrin) in environmental water samples. In the developed method, an ionic liquid (IL) was used for the first time instead of an organic solvent, which is most often used in low-density solvent-based microextraction methods. The IL was placed in a long syringe needle using a microsyringe. It was then dispersed by drawing the sample solution into the syringe. The extraction was finished in the syringe, taking full advantage of the low-density property, and making this method easier and quicker. Several parameters affecting the experimental efficiency of LDIL-DLLME, such as the needle's inner diameter, salt addition, the volume of IL and sample, rotation speed and duration of centrifugation and ultrasound were thoroughly studied. Under optimized conditions, in the range of 1 to 500 mg L-1, good linearity was obtained, with coefficients of determination greater than 0.9994. Three spiked water samples were studied, and recovery ranged from 88.0 to 102.8%, with relative standard deviations (RSDs) ranging from 0.3 to 6.7%. The limits of detection (LODs) for the four pyrethroid insecticides were in the range of 0.88-1.71 mg L-1 and enrichment factors (EFs) were in the range of 242 to 257. The proposed method provides an inexpensive, rapid, simple and eco-friendly process for evaluating pyrethroid insecticides in environmental samples, making it a potential method for the pretreatment of experimental samples.
作者：Hu, Lu; Wang, Xuan; Qian, Heng; Wang, Huazi; Lu, Runhua; Zhang, Sanbing; Zhou, Wenfeng; Gao, Haixiang
作者单位：China Agr Univ, Dept Appl Chem, Yuanmingyuan West Rd 2, Beijing 100194, Peoples R China
期刊名称：RSC ADVANCES
期刊影响因子：3.289
出版年份：2016
出版刊次：1
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