title: Gold nanoparticles modified carbon paste electrode for differential pulse voltammetric determination of eugenol.
abstract: 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 (pH8) 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 deviation was 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%.
authors.affiliation: Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran; Department of Environment, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. Electronic address: daryoush_afzali@yahoo.com.
authors.forename: Daryoush
authors.initials: D
authors.lastname: Afzali
authors.affiliation: Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran; Young Research Society, Shahid Bahonar University of Kerman, Kerman, Iran.
authors.forename: Somaye
authors.initials: S
authors.lastname: Zarei
authors.affiliation: Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran; Young Research Society, Shahid Bahonar University of Kerman, Kerman, Iran.
authors.forename: Fariba
authors.initials: F
authors.lastname: Fathirad
authors.affiliation: Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Mostafavi
mesh_terms: D002244:Carbon; D004566:Electrodes; D005054:Eugenol / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction
chemical_list: D005054:Eugenol; D002244:Carbon; D006046:Gold
keywords: Differential pulse voltammetry; Eugenol determination; Gold nanoparticles; Modified carbon paste electrode