期刊
FRONTIERS IN CHEMISTRY
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2020.00505
关键词
graphene quantum dots (GQDs); electrochemiluminescence (ECL); sunset yellow; food safety; sensor
资金
- Tianjin Development Program for Innovation and Entrepreneurship, Tianjin Natural Science Foundation [18JCZDJC99800, 17JCQNJC00900]
- National Natural Science Foundation of China [51502203]
- Tianjin Young Overseas High-level Talent Plans [01001502]
- Tianjin Science and Technology Foundation [17ZXZNGX00090]
- Tianjin Distinguished Professor Foundation of Young Researchers
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 mu M 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.
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