Tian Li, Li Huiling, Han Pengfei, Ma Guangping, Wang Wenzhuo, Jiang Hanyue, Lu Juan
College of Chemistry, Changchun Normal University, Changchun, 130032, People's Republic of China.
Mikrochim Acta. 2025 Apr 27;192(5):324. doi: 10.1007/s00604-025-07144-7.
An electrochemiluminescence (ECL) sensor was constructed based on Ru(bpy)@Au and GO@CdS for the detection of tartrazine (TTZ). In the presence of the co-reactant TPrA, Ru(bpy) and CdS quantum dots (QDs) were used as dual luminophores to synergistically amplify the ECL signal of the sensor. Gold nanoparticles (Au NPs) enhanced the electron transport capability of the system and thereby amplified the ECL intensity. Graphene oxide (GO), as a carrier, has a special wrinkle-like structure that not only adsorbed a substantial amount of CdS QDs but also prevented their agglomeration. Additionally, a more sensitive detection method was established based on the quenching of the ECL signal, which occurred due to the interaction between Ru(bpy) and TTZ. A low detection limit (1.3 × 10 mol·L, S/N = 3) was obtained for TTZ concentrations ranging from 4.0 × 10 to 4.0 × 10 mol·L. Finally, actual measurement results from three beverage samples demonstrated that the prepared sensors possess excellent practical capabilities for TTZ detection.
基于Ru(bpy)@Au和GO@CdS构建了一种用于检测柠檬黄（TTZ）的电化学发光（ECL）传感器。在共反应剂三丙胺（TPrA）存在的情况下，Ru(bpy)和硫化镉量子点（QDs）用作双发光体，协同放大传感器的ECL信号。金纳米颗粒（Au NPs）增强了系统的电子传输能力，从而放大了ECL强度。氧化石墨烯（GO）作为载体，具有特殊的皱纹状结构，不仅吸附了大量的硫化镉量子点，还防止了它们的团聚。此外，基于Ru(bpy)与TTZ之间的相互作用导致的ECL信号猝灭，建立了一种更灵敏的检测方法。对于浓度范围为4.0×10至4.0×10 mol·L的TTZ，获得了低检测限（1.3×10 mol·L，S/N = 3）。最后，三个饮料样品的实际测量结果表明，所制备的传感器具有出色的TTZ检测实际能力。
