Shan Xiangyu, Lu Juan, Li Chao, Wu Qian, Li Huiling, Yang Shuning, Guo Yanjia, Song Yujia, Li Ruidan, Tian Li
College of Chemistry, Changchun Normal University, Changchun, 130032, People's Republic of China.
Mikrochim Acta. 2024 Mar 21;191(4):215. doi: 10.1007/s00604-024-06283-7.
An efficient and innovative electrochemiluminescence (ECL) sensor was developed for trace detection of cyfluthrin. The sensor utilized materials such as lotus root shaped carbon fiber (Co CNFs), cadmium selenide quantum dots (CdSe QDs), and FeO to amplify Ru(bpy) signals. Co CNFs, with its large specific surface area and porosity, served the purpose of not only enhancing the stability of the sensor by fixing CdSe QDs and Ru(bpy) on the Co CNFs/GCE, but also facilitating electron transfer. CdSe QDs was involved in the luminescence reaction and collaborated with Ru(bpy) to enhance the sensor's sensitivity, while FeO promoted electron transfer in the system due to its large surface area. The solid-state ECL sensor achieved satisfactory signal under the synergistic action of these components. The ECL signal of the sensor was quenched by cyfluthrin, and a favorable linear relationship was observed between the sensor and cyfluthrin in the concentration range 1 × 10 to 1 × 10 M. The detection limit of the sensor was 3.3 × 10 M (S/N = 3). The utilization of lotus root shaped carbon fiber, CdSe QDs, and FeO in the Ru(bpy) system demonstrated a synergistic effect for cyfluthrin detection, presenting a new approach for the rapid determination analysis of pesticide residues in foods.
开发了一种高效创新的电化学发光（ECL）传感器用于氯氟氰菊酯的痕量检测。该传感器利用莲藕状碳纤维（Co CNFs）、硒化镉量子点（CdSe QDs）和FeO等材料来放大Ru(bpy)信号。Co CNFs具有大的比表面积和孔隙率，不仅通过将CdSe QDs和Ru(bpy)固定在Co CNFs/GCE上提高了传感器的稳定性，还促进了电子转移。CdSe QDs参与发光反应并与Ru(bpy)协同作用以提高传感器的灵敏度，而FeO因其大的表面积促进了体系中的电子转移。在这些组分的协同作用下，固态ECL传感器获得了令人满意的信号。该传感器的ECL信号被氯氟氰菊酯猝灭，在1×10至1×10 M的浓度范围内，传感器与氯氟氰菊酯之间呈现出良好的线性关系。该传感器的检测限为3.3×10 M（S/N = 3）。在Ru(bpy)体系中利用莲藕状碳纤维、CdSe QDs和FeO对氯氟氰菊酯检测表现出协同效应，为食品中农药残留的快速测定分析提供了一种新方法。
