In the present study, a carbon paste electrode chemically modified with gold nanoparticles was used as a sensitive
electrochemical sensor for determination of eugenol. The differential pulse voltammetric method was
employed to study the behavior of eugenol on this modified electrode. The effect of variables such as percent
of gold nanoparticles, pH of solution, accumulation potential and time on voltammogram peak current were
optimized. The proposed electrode showed good oxidation response for eugenol in 0.1 mol L−1 phosphate buffer
solution (pH 8) and the peak potential was about +285 mV (vs. Ag/AgCl). The peak current increased linearly
with the eugenol concentration in the range of 5–250 μmol L−1. The detection limit was found to be 2.0 μmol
L−1 and the relative standard deviationwas 1.2% (n=7). The effect of interferences on the eugenol peak current
was studied. The method has been applied to the determination of eugenol in different real samples, spiked
recoveries were in the range of 96%–99%.