TY - JOUR AU - Niu, Huimin AU - Yang, Xin AU - Wang, Yilei AU - Li, Mingchen AU - Zhang, Guangliang AU - Pan, Peng AU - Qi, Yangyang AU - Yang, Zhengchun AU - Wang, John AU - Liao, Zhenyu PY - 2020 M3 - Original Research TI - Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots JO - Frontiers in Chemistry UR - https://www.frontiersin.org/articles/10.3389/fchem.2020.00505 VL - 8 SN - 2296-2646 N2 - 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. ER -