Journal
ELECTROANALYSIS
Volume 24, Issue 3, Pages 666-675Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201100465
Keywords
Ascorbic acid; Acetaminophen; Tryptophan; Modified-carbon nanotubes paste electrode; Electrocatalysis; Square wave voltammetry
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Funding
- Isfahan University of Technology Research Councils
- Center of Excellence in Sensors and Green Chemistry
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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 mu molL-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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