Fabrication of CeO2 Nanoparticle Modified Glassy Carbon Electrode for Ultrasensitive Determination of Trace Amounts of Uric Acid in Urine

Autor:	Bin Fang, Yan Wei, Mao-Guo Li
Rok vydání:	2007
Předmět:	Detection limit Quinhydrone electrode Chemistry Electrode Inorganic chemistry Nanoparticle General Chemistry Cyclic voltammetry Electrocatalyst Ascorbic acid Dielectric spectroscopy
Zdroj:	Chinese Journal of Chemistry. 25:1622-1626
ISSN:	1614-7065 1001-604X
DOI:	10.1002/cjoc.200790300
Popis:	The preparation of a glassy carbon electrode modified by CeO2 nanoparticles was described, which was characterized by cyclic voltammetry and electrochemical impedance spectroscopy. In pH 6.0 buffer, the CeO2 nanoparticle modified electrode (CeO2 NP/GC) gave an excellent electrocatalytic activity for the oxidation of uric acid (UA). The catalytic current of UA versus its concentration had a good linear relation in the range of 2.0×10−7−5.0×10−4 mol/L, with the correlation coefficient of 0.9986 and detection limit of 1.0×10−7 mol/L. The modified electrode can be used for the determination of UA in urine, which can tolerate the interference of ascorbic acid up to 1000-fold. The method was simple, quick and sensitive.
Databáze:	OpenAIRE
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