Synthesis of core-shell magnetic molecularly imprinted polymer for the selective determination of imidacloprid in apple samples

文献类型： 外文期刊

第一作者： Farooq, Saqib

作者： Farooq, Saqib;Nie, Jiyun;Cheng, Yang;Yan, Zhen;Bacha, Syed Asim Shah;Zhang, Jianyi;Nahiyoon, Riaz Ali;Farooq, Saqib;Nie, Jiyun;Cheng, Yang;Yan, Zhen;Bacha, Syed Asim Shah;Zhang, Jianyi;Farooq, Saqib;Nie, Jiyun;Cheng, Yang;Yan, Zhen;Bacha, Syed Asim Shah;Zhang, Jianyi;Hussain, Quaid

作者机构：

关键词： adsorption isotherms; apple; imidacloprid; insecticides; molecularly imprinted polymers

期刊名称：JOURNAL OF SEPARATION SCIENCE （ 影响因子：3.645； 五年影响因子：2.943 ）

ISSN： 1615-9306

年卷期： 2019 年 42 卷 14 期

页码：

收录情况： SCI

摘要： This work demonstrates the synthesis and characterization of core-shell magnetic molecularly imprinted polymers based on surface imprinting using methacryloyl chloride as a functional monomer for the selective extraction of imidacloprid (template) from apple fruit. The characterization analysis results ensured the successful synthesis of the magnetic molecularly imprinted polymers owing to their heterogeneous structure and good magnetic properties. An isothermal binding test was assessed with a pseudo-second-order kinetic model, and the kinetic results fit well to the Freundlich isothermal model. The polymers exhibited an adsorption capacity of 5.75 mg/g for the target analyte with a good selective extraction ability. In addition, the polymers can be reused several times without significant performance loss. The molecularly imprinted polymers showed good performance in the analysis of spiked apple sample with a linear range of 0.05-1.0 mg/L, a limit of detection of 0.048 mg/L and a limit of quantification of 0.146 mg/L (S/N = 3/10). The recoveries of the samples were 77.66-96.57% and their respective relative standard deviations were 3.36-0.45%. All the results indicated that the proposed method provided good selective extraction, as qualifying the analytical standards.

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