Electrochemical Determination of Catechol Using Modifie Modified Electrode
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Date
2014-06
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Addis Ababa University
Abstract
A simple, sensitive and selective electrochemical method for determination of catechol has been
developed at a glassy carbon electrode modified with single walled carbon nanotubes (SWCNT)
and poly (3, 4 ethylendioxythiophene) (PEDOT) conducting polymer through the oxidation of
catechol. The oxidation potential of catechol on the SWCNTs/PEDOT/GC modified electrode
was much lower and the oxidation currents were higher compared to the bare electrode. Under
the optimum conditions, the differential pulse voltammetric current of the sensor was linear in
the concentration range 6 – 100 μM with a detection limit of 0.18 μM. The detection limit is
comparable or better than many electrochemical methods currently reported for catechol
determination, and the sensor is cheaper and easier for fabrication. The sensor was not only
convenient for quantifying catechol in the presence of common interferences but also capable of
detection in tea samples and tap water.
Keywords: Electrochemistry, conducting polymer, electropolymerisation, single wall carbon
nanotube, poly (3, 4-ethylenedioxthiophene), modified, electrode, catechol
Description
Keywords
Electrochemistry, Conducting Polymer, Electropolymerisation, Single Wall Carbon Nanotube, Poly (3, 4-Ethylenedioxthiophene), Modified, Electrode, Catechol