Electrochemical Oxidation of Flavonoids at a Nano- Metal Oxide Modified Carbon Paste Electrodes and Determination Their Levels in Human Urine

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Title:	Electrochemical Oxidation of Flavonoids at a Nano- Metal Oxide Modified Carbon Paste Electrodes and Determination Their Levels in Human Urine
Authors:	Wang, Lai-Hao Liu, Hsiu-Hua
Contributors:	醫藥化學系
Keywords:	Nano- Metal Oxide Modified Carbon Paste Electrodes Flow-Through Voltammetric Detector Flavonoids Human Urine
Date:	2013-01
Issue Date:	2014-05-26 10:45:39 (UTC+8)
Publisher:	Bentham Science Publ Ltd
Abstract:	We constructed nano- metal oxide (tin oxide, cerium oxide, cobalt oxide, iron oxide, nickel oxide, gold oxide, and silver oxide) -modified carbon paste electrodes (CPEs) for detecting flavonols (kaempferol, myricetin, and quercetin) and flavones (luteolin and apigenin) using high-performance liquid chromatography with an electrochemical detector (HPLC-ECD). Flavonoids are more efficiently catalytically oxidized on a gold oxid e-modified CPE than on a bare CPE. For direct current mode, with the current at a constant potential, and measurements with suitable experimental parameters, a linear concentration from 40 to 1600 ng mL(-1) was found. The limits of quantification for flavonoids were below 0.5 ng. The developed method detected flavonoids in urine samples. Findings using HPLC-ECD and HPLC with an ultraviolet detector were comparable.
Relation:	Current Analytical Chemistry, v.9 n.1 pp.143-149
Appears in Collections:	[Dept. of Food & Drug Industry and Inspective Technology] Periodical Articles

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