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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >A disposable molecularly imprinted electrochemical sensor based on screen-printed electrode modified with ordered mesoporous carbon and gold nanoparticles for determination of ractopamine
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A disposable molecularly imprinted electrochemical sensor based on screen-printed electrode modified with ordered mesoporous carbon and gold nanoparticles for determination of ractopamine

机译：基于有序介孔碳和金纳米粒子修饰的丝网印刷电极的一次性分子印迹电化学传感器，用于测定莱克多巴胺

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The following paper describes a surface molecular self-assembly strategy used to imprint the electropolymerized molecular imprinted membrane (MIM) on the surface of the screen-printed electrode (SPE) modified with ordered mesoporous carbon material (OMC) and gold nanoparticles (AuNPs) for determination of ractopamine (RAC). A SPE modified with OMC and AuNPs is assembled and tested. Electrochemical and morphological investigations highlight the effective performance of such a modified SPE in rate of electron-transfer and electroactive surface (0.1270), which is more than that of bare SPE (0.0305), AuNPs/SPE (0.0601), OMC/SPE (0.0798). Electropolymerizable rho-Aminothiophenol (rho-ATP) and dummy-template Ritodrine (RIT) were first assembled on the AuNPs/OMCs/SPE surface. And subsequently, the MIM was formed by electropolymerization, the recognition sites matching RAC were obtained after the removal of RIT. Cylic voltammetry (CV), differential pulse voltammetry (DPV), electrochemical impedance spectra (EIS) and scanning electron microscopy (SEM) were used to characterized the MIM sensor. Factors that affected the performance of the MIM sensor were discussed and optimized. Under the optimal conditions, the DPV current response was linear with the logarithm (log) concentration of the RAC in the range from 5 x 10(-11) to 1 x 10(-9) mol L-1 (R2 = 0.9911) with the detection limit of 4.23 x 10-11 mol L-1 (S/N = 3). The sensor had rapid equilibrium incubation time (100 s), high binding affinity and selectivity towards RAC. The average recovery of RAC from the swine urine was excellent ranging from 95.7% to 993%. (C) 2016 Elsevier B.V. All rights reserved.
机译：以下论文描述了一种表面分子自组装策略，该策略用于将电聚合分子印迹膜（MIM）印迹在用有序介孔碳材料（OMC）和金纳米颗粒（AuNPs）改性的丝网印刷电极（SPE）的表面上。莱克多巴胺（RAC）的测定。组装并测试了用OMC和AuNP修饰的SPE。电化学和形态学研究突显了这种改性SPE在电子传递和电活性表面速率（0.1270）方面的有效性能，高于裸SPE（0.0305），AuNPs / SPE（0.0601），OMC / SPE（0.0798） ）。首先在AuNPs / OMCs / SPE表面上组装可电聚合的rho-氨基硫酚（rho-ATP）和伪模板Ritodrine（RIT）。随后，通过电聚合形成MIM，去除RIT后获得与RAC匹配的识别位点。循环伏安法（CV），差分脉冲伏安法（DPV），电化学阻抗谱（EIS）和扫描电子显微镜（SEM）用来表征MIM传感器。讨论并优化了影响MIM传感器性能的因素。在最佳条件下，DPV电流响应与RAC的对数（log）浓度在5 x 10（-11）到1 x 10（-9）mol L-1（R2 = 0.9911）之间呈线性关系检测限为4.23 x 10-11 mol L-1（S / N = 3）。该传感器具有快速的平衡孵育时间（100 s），高结合亲和力和对RAC的选择性。猪尿中RAC的平均回收率在95.7％至993％之间。 （C）2016 Elsevier B.V.保留所有权利。

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