An electrochemiluminescence sensor based on Ru(bpy)32+@Au and GO@CdS for detection of tartrazine

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-04-27 DOI:10.1007/s00604-025-07144-7

Li Tian, Huiling Li, Pengfei Han, Guangping Ma, Wenzhuo Wang, Hanyue Jiang, Juan Lu

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Abstract

An electrochemiluminescence (ECL) sensor was constructed based on Ru(bpy)₃²⁺@Au and GO@CdS for the detection of tartrazine (TTZ). In the presence of the co-reactant TPrA, Ru(bpy)₃²⁺ 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)₃²⁺ and TTZ. A low detection limit (1.3 × 10^–13 mol·L⁻¹, S/N = 3) was obtained for TTZ concentrations ranging from 4.0 × 10^–13 to 4.0 × 10^–8 mol·L⁻¹. Finally, actual measurement results from three beverage samples demonstrated that the prepared sensors possess excellent practical capabilities for TTZ detection.

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.