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
作者： Wei, Liang 1 ; Huang, Xinlong 1 ; Zheng, Lufei 2 ; Wang, Jing 2 ; Ya, Yu 3 ; Yan, Feiyan 3 ;
作者机构： 1.Guangxi Teachers Educ Univ, Coll Chem & Mat Sci, Nanning 530001, Peoples R China
2.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Beijing 100081, Peoples R China
3.Guangxi Acad Agr Sci, Inst Agr Prod Qual Safety & Testing Technol, Nanning 530007, Peoples R China
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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