Authors: Ali A Ensafi, Hassan Karimi‐Maleh, Shadpour Mallakpour

Publication date: 2011/6/1

Journal name: Electroanalysis

Volume: 23

Pages: 1478-1487

Publisher: WILEY‐VCH Verlag

Abstract N-(3, 4-dihydroxyphenethyl)-3, 5-dinitrobenzamide modified multiwall carbon
nanotubes paste electrode was used as a voltammetric sensor for oxidation of penicillamine
(PA), uric acid (UA) and tryptophan (TP). In a mixture of PA, UA and TP, those
voltammograms were well separated from each other with potential differences of 300, 610,
and 310 mV, respectively. The peak currents were linearly dependent on PA, UA and TP
concentrations in the range of 0.05–300, 5–420, and 1.0–400 µmol L− 1, with detection ...