2003•Fuzhou daxue xuebao. Ziran kexue banRequires access

Study of the electrochemical behavior of quercetin

Jun You

Abstract

The electrochemical oxidation of quercetin(QUE) at a glassy carbon electrode has been investigated. In the Na 2B 4O 7(0.05?mol/L)-NaH 2PO 4(0.1?mol/L) (pH=5.8) buffer solution, one well-defined oxidation peak of quercetin is obtained, and the peak potential is 0.20?V(vs.SCE). The peak current is proportional to the concentration of quercetin over the range of 8.0×10 -8-1.0×10 -4mol/L by differential pulse voltammetry. The detection limit is 2.6×10 -8mol/L. QUE was successfully determined in the spiked human blood plasma samples. The developed method is more sensitive than that of previous reported voltammetric studies. The oxidation reaction mechanism is also discussed.

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Available abstract

Key concepts: Quercetin, Differential pulse voltammetry, Peak current, Electrochemistry, Detection limit, Chemistry, Voltammetry, Buffer solution