College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan 414006, China.
College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan 414006, China.
Food Chem. 2023 Oct 15;423:136294. doi: 10.1016/j.foodchem.2023.136294. Epub 2023 May 2.
In this work, a highly sensitive and selective molecularly imprinted electrochemical sensor is exploited to detect zearalenone (ZEA) by the synergistic effect of reduced graphene nanoribbons (rGNRs) and gold nanoparticles (AuNPs). The oxidized GNRs are firstly produced by an improved Hummers' oxidation method, and then reduced and modified together with AuNPs onto a glassy carbon electrode by electrodeposition technique to realize collaborative amplification of electrochemical signal. The molecularly imprinted polymer film with specific recognition sites can be generated on the modified electrode by electropolymerization. The effect of experimental conditions is systematically investigated to obtain the best detection performance. It is found that the constructed sensor shows a wide linear range of 1-500 ng·mL for ZEA with a detection limit as low as 0.34 ng·mL. Obviously, our constructed molecularly imprinted electrochemical sensor shows great potential in the application of precisely detecting ZEA in food.
在这项工作中，我们利用还原氧化石墨烯纳米带（rGNRs）和金纳米粒子（AuNPs）的协同效应，开发了一种高灵敏度和选择性的分子印迹电化学传感器来检测玉米赤霉烯酮（ZEA）。首先通过改进的 Hummers 氧化法制备氧化 GNRs，然后通过电沉积技术将其与 AuNPs 一起还原并修饰在玻碳电极上，以实现电化学信号的协同放大。通过电聚合可以在修饰电极上生成具有特定识别位点的分子印迹聚合物膜。系统研究了实验条件的影响，以获得最佳的检测性能。结果发现，所构建的传感器对 ZEA 具有 1-500ng·mL 的宽线性范围，检测限低至 0.34ng·mL。显然，我们构建的分子印迹电化学传感器在精确检测食品中 ZEA 方面具有很大的应用潜力。
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