College of Chemistry, Changchun Normal University, Changchun, 130032, P.R. China.
Technological Innovation Laboratory for Research and Development of Economic Plants and Edible and Medicinal Fungi in Cold Region of Jilin Province, Changchun, 130032, P.R. China.
Mikrochim Acta. 2024 Aug 5;191(9):508. doi: 10.1007/s00604-024-06582-z.
A solid-state electrochemiluminescence (ECL) sensor was fabricated by immobilizing luminol, a classical luminescent reagent, on a Zn-Co-ZIF carbon fiber-modified electrode for the rapid and sensitive detection of procymidone (PCM) in vegetable samples. The sensor was created by sequentially modifying the glassy carbon electrode with Zn-Co-ZIF carbon fiber (Zn-Co-ZIF CNFs), Pt@Au NPs, and luminol. Zn-Co-ZIF CNFs, prepared through electrospinning and high-temperature pyrolysis, possessed a large specific surface area and porosity, making it suitable as carrier and electron transfer accelerator in the system. Pt@Au NPs demonstrated excellent catalytic activity, effectively enhancing the generation of active substances. The ECL signal was significantly amplified by the combination of Zn-Co-ZIF CNFs and Pt@Au NPs, which can subsequently be diminished by procymidone. The ECL intensity decreased proportionally with the addition of procymidone, displaying a linear relationship within the concentration range 1.0 × 10 to 1.0 × 10 mol L (R = 0.993). The sensor exhibited a detection limit of 3.3 × 10 mol L (S/N = 3) and demonstrated outstanding reproducibility and stability, making it well-suited for the detection of procymidone in vegetable samples.
一种固态电化学发光（ECL）传感器通过将鲁米诺（一种经典的发光试剂）固定在 Zn-Co-ZIF 碳纤维修饰电极上来制备，用于快速灵敏地检测蔬菜样品中的噻菌灵（PCM）。传感器是通过依次修饰玻碳电极、Zn-Co-ZIF 碳纤维（Zn-Co-ZIF CNFs）、Pt@Au NPs 和鲁米诺来制备的。通过静电纺丝和高温热解制备的 Zn-Co-ZIF CNFs 具有较大的比表面积和孔隙率，适合作为该体系中的载体和电子转移促进剂。Pt@Au NPs 表现出优异的催化活性，可有效增强活性物质的生成。Zn-Co-ZIF CNFs 和 Pt@Au NPs 的结合显著放大了 ECL 信号，随后可被噻菌灵减弱。ECL 强度随噻菌灵的加入而呈比例下降，在 1.0×10 到 1.0×10 mol L 的浓度范围内呈现线性关系（R=0.993）。该传感器的检测限为 3.3×10 mol L（S/N=3），表现出出色的重现性和稳定性，非常适合检测蔬菜样品中的噻菌灵。
