Molecularly Imprinted Electrochemical Sensor Based on MWCNTs/GQDs for the Detection of Sulfamethazine in Aquaculture Seawater

文献类型： 外文期刊

第一作者： Chen, Jianlei

作者： Chen, Jianlei;Zhang, Tianruo;Xu, Yong;Li, Hao;Cui, Hongwu;Zhao, Xinguo;Zhou, Yun;Qu, Keming;Cui, Zhengguo;Chen, Jianlei;Zhang, Tianruo;Xu, Yong;Li, Hao;Cui, Hongwu;Zhao, Xinguo;Zhou, Yun;Qu, Keming;Cui, Zhengguo;Zhang, Tianruo;Zhou, Yun

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关键词： aquaculture seawater; sulfadimidine; electrochemical sensor; molecular imprinting

期刊名称：BIOSENSORS-BASEL （ 影响因子：5.6； 五年影响因子：5.7 ）

ISSN：

年卷期： 2025 年 15 卷 3 期

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收录情况： SCI

摘要： In this work, a novel molecularly imprinted electrochemical sensor was proposed based on molecular imprinting technology for the detection of sulfamethazine. A glassy carbon electrode was modified with a composite material of carbon nanotubes and graphene quantum dots to effectively improve sensitivity. The molecularly imprinted electrochemical sensor was then prepared by electropolymerization using sulfamethazine as the template and o-phenylenediamine as the functional monomer on the modified electrode. Under optimal measurement conditions, electrochemical tests of different sulfamethazine concentrations (0.5 mu M-200 mu M) showed excellent linearity and a detection limit of 0.068 mu M. In addition, the sensor demonstrated satisfactory selectivity, stability, and reusability. Furthermore, the sensor was applied to the spiked analysis of sulfamethazine in grouper aquaculture water, achieving recovery rates between 95.4% and 104.8%, with a relative standard deviation (RSD) of less than 4.14%. These results indicated that the developed method was effective for the analysis of sulfamethazine in aquaculture seawater, providing a new approach for the detection of antibiotic residues in seawater samples.

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