一种基于碳纳米管和CdSe@ZnSe的电化学发光传感器用于测定牛奶样品中的三聚氰胺。
An electrochemiluminescence sensor based on the CNTs and CdSe@ZnSe for determination of melamine in milk samples.
作者信息
Wu Qian, Tian Li, Shan Xiangyu, Li Huiling, Yang Shuning, Li Chao, Lu Juan
机构信息
College of Chemistry, Changchun Normal University, Changchun 130032, People's Republic of China.
College of Chemistry, Changchun Normal University, Changchun 130032, People's Republic of China.
出版信息
Food Chem. 2024 Jan 1;430:137028. doi: 10.1016/j.foodchem.2023.137028. Epub 2023 Jul 26.
In this work, a novel electrochemiluminescence (ECL) sensor based on the CdSe@ZnSe and CNTs was constructed for the detection of melamine. CdSe@ZnSe acted as the co-reaction promoter for the enhancement of Ru(bpy)/tri-n-propylamine (TPrA) system and CNTs acted as carriers to immobilize more CdSe@ZnSe. The initial ECL signal significantly amplified due to the synergistic effect of CNTs and CdSe@ZnSe. The ECL signal decreased with the addition of melamine, and the change value of ECL intensity (ΔI) was linearly related to the logarithm of melamine concentration. The constructed ECL sensor was able to detect melamine in the range of 1.0 × 10 - 1.0 × 10 M, and the detection limit was 3.3 × 10 M (S/N = 3). It can be used to detect melamine in milk samples.
在本工作中，构建了一种基于CdSe@ZnSe和碳纳米管（CNTs）的新型电化学发光（ECL）传感器用于三聚氰胺的检测。CdSe@ZnSe作为共反应促进剂增强Ru(bpy)/三正丙胺（TPrA）体系，而CNTs作为载体固定更多的CdSe@ZnSe。由于CNTs和CdSe@ZnSe的协同作用，初始ECL信号显著放大。加入三聚氰胺后ECL信号降低，且ECL强度变化值（ΔI）与三聚氰胺浓度的对数呈线性关系。所构建的ECL传感器能够检测浓度范围为1.0×10⁻⁹ - 1.0×10⁻⁷ M的三聚氰胺，检测限为3.3×10⁻¹⁰ M（S/N = 3）。它可用于检测牛奶样品中的三聚氰胺。
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