Extraction of pesticides in water samples using vortex-assisted liquid-liquid microextraction

文献类型： 外文期刊

第一作者： Jia, Chunhong

作者： Jia, Chunhong;Zhu, Xiaodan;Zhao, Ercheng;He, Min;Chen, Li;Yu, Pingzhong;Jia, Chunhong;Zhu, Xiaodan;Wang, Jihua;Zhao, Ercheng;He, Min;Chen, Li;Yu, Pingzhong

作者机构：

关键词： Pesticide;Residue analysis;Sample preparation;VALLME;Vortex-assisted liquid-liquid microextraction

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A simple solvent microextraction method termed vortex-assisted liquid-liquid microextraction (VALLME) coupled with gas chromatography micro electron-capture detector (GC-μECD) has been developed and used for the pesticide residue analysis in water samples. In the VALLME method, aliquots of 30μL toluene used as extraction solvent were directly injected into a 25mL volumetric flask containing the water sample. The extraction solvent was dispersed into the water phase under vigorously shaking with the vortex. The parameters affecting the extraction efficiency of the proposed VALLME such as extraction solvent, vortex time, volumes of extraction solvent and salt addition were investigated. Under the optimum condition, enrichment factors (EFs) in a range of 835-1115 and limits of detection below 0.010μgL~(-1) were obtained for the determination of target pesticides in water. The calculated calibration curves provide high levels of linearity yielding correlation coefficients (r~2) greater than 0.9958 with the concentration level ranged from 0.05 to 2.5μgL~(-1). Finally, the proposed method has been successfully applied to the determination of pesticides from real water samples and acceptable recoveries over the range of 72-106.3% were obtained.

分类号： O65

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