Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots

Frontiers in Chemistry

John Wang¹  Zhenyu Liao³  Huimin Niu⁴  Xin Yang⁴  Mingchen Li⁴  Zhengchun Yang⁴  Peng Pan⁴  Yangyang Qi⁴  Guangliang Zhang⁴  Yilei Wang⁵ 

[1] Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore;Pony Testing International Group, Tianjin, China;Tianjin Food Safety Inspection Technology Institute, Tianjin, China;Tianjin Key Laboratory of Film Electronic and Communication Devices, Advanced Materials and Printed Electronics Center, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin, China;Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China;

关键词: graphene quantum dots (GQDs);    electrochemiluminescence (ECL);    sunset yellow;    food safety;    sensor;   

DOI  :  10.3389/fchem.2020.00505

来源: DOAJ

【 摘 要 】

Use of food additives, such as colorants and preservatives, is highly regulated because of their potential health risks to humans. Therefore, it is important to detect these compounds effectively to ensure conformance with industrial standards and to mitigate risk. In this paper, we describe the preparation and performance of an ultrasensitive electrochemiluminescence (ECL) sensor for detecting a key food additive, sunset yellow. The sensor uses graphene quantum dots (GQDs) as the luminescent agent and potassium persulfate as the co-reactant. Strong and sensitive ECL signals are generated in response to trace amounts of added sunset yellow. A detection limit (signal-to-noise ratio = 3) of 7.6 nM and a wide linear range from 2.5 nM to 25 μM are demonstrated. A further advantage of the method is that the luminescent reagents can be recycled, indicating that the method is sustainable, in addition to being simple and highly sensitive.

【 授权许可】

Unknown