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Graphene and DCHP modified glassy carbon electrode for sensitive determination of rutin in tea
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: Paper number 141899177rev, 2014 Montreal, Quebec Canada July 13 – July 16, 2014. (doi: 10.13031/aim.20141899177) @2014
Authors: Hui Wang, Zhiqiang Wang, Zhihao Zhang, Xiaodan Ma, Gang Liu, Miao Zhang
Keywords: electrode, rutin, graphene, electrochemistry
Abstract. A glassy carbon electrode (GCE) modified by graphene (GR) and dicyclohexyl phthalate (DCHP) using for the determination of rutin in tea was fabricated and investigated, which displayed excellent electrochemical performance owing to the formation of highly conductive GR film and the binder of DCHP on the electrode surface. Different electrochemical methods such as cyclic voltammetry and electrochemical impedance spectroscopy were used to investigate the electrochemical behaviors of rutin on GR/DCHP/GCE with the electrochemical parameters calculated. Under the optimized conditions, the oxidative peaks increased linearly with rutin concentrations in the ranges from 1.0 to 2.5 uM with a limit of detection as low as 0.07 uM (S/N= 3). The modified electrode was proved to have excellent selectivity, stability and repeatability, which was successfully employed to the determination of rutin content in tea with satisfactory results.
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