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Determination of trichlorfon using a molecularly imprinted electrochemiluminescence sensor on multi-walled carbon nanotubes decorated with silver nanoparticles

文献类型： 外文期刊

作者： Li, Shuhuai 1 ; Luo, Jinmei 1 ; Wu, Yuwei 1 ; Ma, Xionghui 1 ; Pang, Chaohai 1 ; Wang, Mingyue 1 ; Luo, Jinhui 1 ; Zhang, Chenghui 2 ; Tan, Gaohao 3 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Key Lab Qual & Safety Control Subtrop Fruit & Veg, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Anal & Test Ctr,Minist Agr & Rural Affairs, Haikou 571101, Hainan, Peoples R China

2.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China

3.Key Lab Trop Fruits & Vegetables Qual & Safety St, Haikou 570311, Hainan, Peoples R China

关键词： Molecularly imprinted sensor; Electrochemiluminescence; Double amplification effect; Trichlorfon detection; Multi-walled carbon nanotube

期刊名称：MICROCHIMICA ACTA （ 影响因子：6.408； 五年影响因子：5.888 ）

ISSN： 0026-3672

年卷期： 2022 年 189 卷 9 期

页码：

收录情况： SCI

摘要： Considering the limitations associated with existing methods for the detection of trace amounts of trichlorfon, this paper proposes a novel molecularly imprinted electrochemiluminescence (ECL) sensor for the detection of trichlorfon by utilizing the double enhancement effect of trichlorfon and Ag nanoparticles supported by multi-walled carbon nanotubes (MWCNTs/Ag NPs) in a luminol-H2O2 ECL system. Here, trichlorfon was electropolymerized on the surface of the MWCNT/Ag NP-modified gold nanoelectrode with o-phenylenediamine to prepare the molecularly imprinted polymer-based sensor. After eluting the trichlorfon, imprinted holes for the identification of trichlorfon were retained on the sensor, which were used as signal switches to obtain different ECL intensities through the adsorption of different concentrations of trichlorfon. The ECL signal of the sensitized luminol-H2O2 was doubly enhanced by the MWCNTs/Ag and trichlorfon, improving the sensitivity of the sensor. The trichlorfon concentration was positively correlated with the enhanced ECL intensity of the sensor in the range 5.0 x 10(-8)-5.0 x 10(-11) mol L-1, and the detection limit of trichlorfon was 3.9 x 10(-12) mol L-1. Moreover, the proposed sensor was successfully applied to the detection of trichlorfon residues in real samples, and the recovery ranged between 91.8 and 109%.

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