Electrochemical Detection of Methyl Parathion using poly-(4-amino-3-hydroxynaphthalene-1-sulphonic acid) Modified Glassy Carbon Electrode
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Date
2009-07
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Addis Ababa Universty
Abstract
A glassy carbon electrode (GCE) was modified with electropolymerization of 4-Amino-3-
Hydroxynaphthalene-1-Sulphonic acid (AHNSA) in 0.1M HNO3 using cyclic voltammetry. The
modified electrode showed an excellent electrocatalytic effect on the redox property of Methyl
Parathion. The bare glassy carbon electrode could barely sense the 8 M concentration solution
of MPT. The modified electrode showed all the expected peaks from the MPT with high
sensitivity. After the optimization of Different parameters, analytical characterization of MPT
was made. The peak current increases linearly with the range of concentration of MPT used in
the analysis (0.2 M-1.6 M). The detection limit was 6.3 x 10-8M by square wave voltammetry.
The modified electrode has successfully been applied for the detection of MPT.
Key words: Conducting Polymers, Electropolymerization, Organophosphorous Pesticides,
AHNSA, Methyl Parathion, Voltammetric technique
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Keywords
Conducting Polymers, Electropolymerization, AHNSA, Methyl Parathion, Voltammetric technique