In this research, the electrochemical sensor was fabricated
based on glassy carbon electrode decorated by the
reduced gold nanoparticles and molecularly imprinted polymer
(MIP) on the electrode surface with methyl parathion
(MP) as the template molecule. Four parameters, such as
amount of gold nanoparticles, deposition time of gold nanoparticles,
pH of acetate buffer solution, and extraction time of
ethanol acidic solution, have been successfully determined by
achieving the optimal sensor preparation. The MP in aqueous
matrix can be quantitatively determined in the range of 0.05 to
15 μM with two linear equations at low and high ranges. In
addition, the selectivity of the sensor as prepared toward the
MP measurement is superior by comparing with similar structured
compounds, such as imidacloprid and fenitrothion. This
study also demonstrates that the deviation of current response
from the MP in different matrix samples is negligible using
MIP/Au/glassy carbon electrode sensor with recoveries
ranged from 87.7 to 124.8%.

EB00000003440K

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• Electrochemical Sensor Using Molecular Imprinting Polymerization Modified Electrodes to Detect Methyl Parathion in Environmental Media