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Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N-(3,4-Dihydroxyphenethyl)-3,5-Dinitrobenzamide-Modified Carbon Nanotubes Paste Electrode

  1. Ali A. Ensafi*,
  2. Hassan Karimi-Maleh,
  3. Shadpour Mallakpour

Article first published online: 10 FEB 2012

DOI: 10.1002/elan.201100465

Issue

Electroanalysis

Electroanalysis

Special Issue: Topical Cluster “NATO Workshop for Rapid Detection of Chemical and Biological Agents”

Volume 24, Issue 3, pages 666–675, March 2012

Additional Information

How to Cite

Ensafi, A. A., Karimi-Maleh, H. and Mallakpour, S. (2012), Simultaneous Determination of Ascorbic Acid, Acetaminophen, and Tryptophan by Square Wave Voltammetry Using N-(3,4-Dihydroxyphenethyl)-3,5-Dinitrobenzamide-Modified Carbon Nanotubes Paste Electrode. Electroanalysis, 24: 666–675. doi: 10.1002/elan.201100465

Author Information

  1. Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran tel.: +98 311 3912351; fax: +98 311 3912350

*Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran tel.: +98 311 3912351; fax: +98 311 3912350

Publication History

  1. Issue published online: 1 MAR 2012
  2. Article first published online: 10 FEB 2012
  3. Manuscript Accepted: 23 NOV 2011
  4. Manuscript Received: 25 AUG 2011

Funded by

  • Isfahan University of Technology Research Councils
  • Center of Excellence in Sensors and Green Chemistry

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Keywords:

  • Ascorbic acid;
  • Acetaminophen;
  • Tryptophan;
  • Modified-carbon nanotubes paste electrode;
  • Electrocatalysis;
  • Square wave voltammetry

Abstract

N-(3,4-Dihydroxyphenethyl)-3,5-dinitrobenzamide modified-multiwall carbon nanotubes paste electrode was fabricated and used as an electrocatalyst for the oxidation of ascorbic acid (AA), acetaminophen (AC), and tryptophan (TP) at pH 7.0. In a mixture containing AA, AC, and TP, the separation potentials were large enough to determine those compounds individually and simultaneously. The peak currents obtained were found to be linearly dependent on AA, AC, and TP concentrations in the ranges of 0.03–70, 0.6–452, and 0.7–270 µmol L−1, respectively. The sensor was used for the determination of AC, AC, and TP in different real samples with satisfactory results.

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