Adsorptive voltammetric behaviors of resveratrol at graphite electrode and its determination in tablet dosage form

The adsorptive voltammetric behavior of resveratrol was studied at a graphite electrode in B-R buffer (pH = 6.0) solution using adsorptive cyclic voltammetric technique. The oxidation of resveratrol is an irreversible adsorption controlled process. The oxidation mechanism was proposed and discussed in this work. The dependence of the current on pH and the concentration and nature of buffer were investigated to optimize the experimental conditions for the determination of resveratrol. It was found that in the range of 8.0 x 10(-9) similar to 2.0 x 10(-6) mol/L, the currents measured by differential pulse voltamnmetries presented a good linear property as a function of the concentrations of resveratrol. In addition, validation parameters, such as reproducibility, sensitivity and recovery were evaluated as well. The proposed method was also successfully applied for the determination of resveratrol in Chinese patent medicine with good results.