Journal
SENSORS
Volume 18, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/s18051660
Keywords
electrochemical sensor; molybdenum selenide; reduced graphene oxide; bisphenol A; beverage
Funding
- National Natural Science Foundation of China [21607161, 21402192]
- Open Fund of the Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Ministry of Agriculture
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Due to the endocrine disturbing effects of bisphenol A (BPA) on organisms, rapid detection has become one of the most important techniques for monitoring its levels in the aqueous solutions associated with plastics and human beings. In this paper, a glassy carbon electrode (GCE) modified with molybdenum selenide/reduced graphene oxide (MoSe2/rGO) was fabricated for in situ determination of bisphenol A in several beverages. The surface area of the electrode dramatically increases due to the existence of ultra-thin nanosheets in a flower-like structure of MoSe2. Adding phosphotungstic acid in the electrolyte can significantly enhance the repeatability (RSD = 0.4%) and reproducibility (RSD = 2.2%) of the electrode. Under the optimized condition (pH = 6.5), the linear range of BPA was from 0.1 mu M-100 mu M and the detection limit was 0.015 mu M (S/N = 3). When using the as-prepared electrode for analyzing BPA in beverage samples without any pretreatments, the recoveries ranged from 98-107%, and the concentrations were from below the detection limit to 1.7 mu M, indicating its potential prospect for routine analysis of BPA.
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