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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
Author(s) -
Ensafi Ali A.,
KarimiMaleh Hassan,
Mallakpour Shadpour
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100465
Subject(s) - ascorbic acid , carbon nanotube , electrode , chemistry , tryptophan , carbon paste electrode , voltammetry , electrocatalyst , nuclear chemistry , square wave , analytical chemistry (journal) , cyclic voltammetry , inorganic chemistry , materials science , chromatography , electrochemistry , nanotechnology , amino acid , biochemistry , physics , food science , voltage , quantum mechanics
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.