Electrodeposition of palladium nanoparticles on porous graphitized carbon monolith modified carbon paste electrode for simultaneous enhanced determination of ascorbic acid and uric acidстатья

Статья опубликована в высокорейтинговом журнале

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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 ноября 2015 г.

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[1] Electrodeposition of palladium nanoparticles on porous graphitized carbon monolith modified carbon paste electrode for simultaneous enhanced determination of ascorbic acid and uric acid / S. Mukdasai, U. Crowley, M. Pravda et al. // Sensors and Actuators, B: Chemical. — 2015. — Vol. 218. — P. 280–288. A novel, simple and highly sensitive electrochemical method is developed for the determination of ascor-bic acid (AA) and uric acid (UA) based on a palladium nanoparticles deposited on porous graphitizedcarbon monolith modified carbon paste electrode (PdNPs/CM/CPE). The chemical modified electrodewas characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy(EIS). The PdNPs/CM/CPE displayed excellent electrochemical catalytic activities toward AA and UA withbare CPE, PdNPs/CPE, CM/CPE and PdNPs/CM/CPE by cyclic voltammetry (CV). The oxidation potentialsof AA and UA at the PdNPs/CM/CPE shifted negatively and the peak currents were much larger thanother electrodes. The amperometric signal of PdNPs/CM/CPE showed a good linearity with correlationcoefficient greater than 0.997. The low detection limits (S/N = 3) for AA and UA were 0.53 umol L−1 and 0.66 umol L−1, respectively. The proposed method showed easy fabrication, high sensitivity and stability,and good reproducibility. In addition, the modified electrode was applied to determine the AA and UA inhuman serum sample. [ DOI ]

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