p-Chloranil modified carbon nanotubes paste electrode as a voltammetric sensor for the simultaneous determination of methyldopa and uric acid

Authors: Hassan Karimi-Maleh, Mohammad A Khalilzadeh, Zahra Ranjbarha, Hadi Beitollahi, Ali A Ensafi, Daryoush Zareyee

Publication date: 2012

Journal name: Analytical Methods

Volume: 4

Pages: 2088-2094

Publisher:: Royal Society of Chemistry

In this study, a multiwalled carbon nanotubes modified electrode (prepared by incorporating
p-chloranil as a mediator) was used as a voltammetric sensor for the determination of
methyldopa (MDOP) in the presence of uric acid (UA). The results indicate that the electrode
is efficient in terms of its electrocatalytic activity for the oxidation of MDOP, leading to an
overpotential reduced by more than 250 mV. Using square wave voltammetry (SWV), we
could measure MDOP and UA in one mixture independently from each other by a ...