Electrochemical sensor for the sensitive determination of parathion based on the synergistic effect of ZIF-8 and ionic liquid

文献类型： 外文期刊

第一作者： Wei, Liang

作者： Wei, Liang;Huang, Xinlong;Zheng, Lufei;Wang, Jing;Ya, Yu;Yan, Feiyan

作者机构：

关键词： Zeolitic imidazolate frameworks; Pyrrolidinium ionic liquid; Synergistic effect; Parathion; Electrochemical sensor

期刊名称：IONICS （ 影响因子：2.817； 五年影响因子：2.649 ）

ISSN： 0947-7047

年卷期： 2019 年 25 卷 10 期

页码：

收录情况： SCI

摘要： In this study, a sensitive electrochemical sensor for parathion was developed on the basis of the synergistic effect of the zeolitic imidazolate framework (ZIF-8) and a pyrrolidinium ionic liquid (PIL). Cyclic voltammetry and electrochemical impedance spectroscopy were employed to characterize the electrochemical properties of the modified electrodes. The PIL/ZIF-8-modified carbon paste electrode (PIL/ZIF-8/CPE) exhibited a high electrode surface area and a more rapid electron-transfer rate compared with the other electrodes. In addition, the electrochemical behavior of parathion at various electrodes was examined. The voltammetric response of parathion at the PIL/ZIF-8/CPE significantly increased in comparison with those at the bare carbon paste electrode (CPE), ZIF-8, and PIL-modified CPE. These results were possibly related to the synergistic effect between ZIF-8 and PIL, both exhibiting unique electronic and catalytic properties. Under optimized conditions, the calibration curve for parathion exhibited a linear range of 5.0-700 mu g/L, with a limit of detection of 2.0 mu g/L. The proposed electrochemical sensor was applied for the determination of parathion in vegetable samples with recoveries from 90.5 to 109%.

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