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Comparison of electrochemical property between multiwalled carbon nanotubes and porous graphitized carbon monolith modified glassy carbon electrode for the simultaneous determination of ascorbic acid and uric acid

Citation

Mukdasai, S and Moore, E and Glennon, JD and He, X and Nesterenko, EP and Nesterenko, PN and Paull, B and Pravda, M and Srijaranai, S, Comparison of electrochemical property between multiwalled carbon nanotubes and porous graphitized carbon monolith modified glassy carbon electrode for the simultaneous determination of ascorbic acid and uric acid, Journal of Electroanalytical Chemistry, 731 pp. 53-59. ISSN 1572-6657 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier

DOI: doi:10.1016/j.jelechem.2014.07.030

Abstract

In this work, glassy carbon electrode (GCE) was modified with porous graphitized carbon monolith (CM) as a new nanomaterials and multi-walled carbon nanotubes (MWCNTs) for simultaneous determination of ascorbic acid (AA) and uric acid (UA). Scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were employed for the surface analysis of the modified electrodes. In this simultaneous detection, the electrochemical response of AA and UA on MWCNTs/GCE exhibited broad anodic peaks and were resolved into separated CV peaks at +45 mV and +254 mV, respectively. In comparison, two well resolved peaks of CM/GCE were obtained at -39 mV and +233 mV with flat base-lines for oxidation of AA and UA, respectively. Under the optimum conditions, the performance of porous graphitized carbon monolith were superior to MWCNTs modified glassy carbon electrode. For CM/GCE, the oxidation peak current was linearly dependent on AA and UA concentration in the range 0.1954.04 mM and 0.0941.90 mM, with the correlation coefficients (R2) greater than 0.997. Detection limits (S/N = 3) were found 0.39 μM and 0.15 μM for AA and UA, respectively. The recoveries of the AA and UA from spiked human serum were 76.094.2%. In addition, the CM/GCE showed high sensitivity, good reproducibility and long-time stability at least 1 month without significant loss of electrochemical signal.

Item Details

Item Type:Refereed Article
Keywords:porous graphitized carbon monolith, multi-walled carbon nanotubes, modified glassy carbon electrode
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Paull, B (Professor Brett Paull)
ID Code:94795
Year Published:2014
Web of Science® Times Cited:6
Deposited By:Chemistry
Deposited On:2014-09-17
Last Modified:2017-10-27
Downloads:0

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