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Supramolecular imprinted electrochemical sensor for the neonicotinoid insecticide imidacloprid based on double amplification by Pt-In catalytic nanoparticles and a Bromophenol blue doped molecularly imprinted film

文献类型: 外文期刊

作者: Li, Shuhuai 1 ; Liu, Chunhua 1 ; Yin, Guihao 1 ; Luo, Jinhui 1 ; Zhang, Zhenshan 1 ; Xie, Yixian 3 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Haikou 571101, Peoples R China

2.Haikou Minist Agr, Lab Qual & Safety Risk Assessment Trop Prod, Haikou 571101, Peoples R China

3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China

关键词: Supramolecular imprint;Nanocomposite Catalytic amplification;2-aminophenol;Electropolymerization;Scanning electronmicroscopy;XPS;Cyclic voltammetry;Vegetables

期刊名称:MICROCHIMICA ACTA ( 影响因子:5.833; 五年影响因子:5.357 )

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年卷期:

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收录情况: SCI

摘要: The authors describe an electrochemical sensor for the neonicotinoid insecticide imidacloprid (IMI) based on Pt-In catalytic nanocomposite film and Bromophenol blue amplification. The Pt-In nanocomposite film was deposited on the surface of a modified glassy carbon electrode. The composite molecularly imprinted polymer (MIP) was prepared by electro-polymerization using bromophenol blue doped o-aminophenol as functional monomer and 4-tert-butylcalix[6]arene-IMI supramolecular inclusion complex as template molecule. The experimental results showed that the current intensity of IMI was clearly amplified in the potential range from -0.3 to -1.8 V, because of the double amplification, based on the Pt-In film and Bromophenol blue catalysis. Moreover, the double recognition ability of the sensor, which relied on the MIP and the vacuum structure of 4-tert-butylcalix[6]arene, effectively increased the specific recognition performance. The feasibility of its practical applications has been demonstrated by the analysis of vegetable samples.

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