Electrochemical behavior of polydatin and its highly-sensitive determination based on graphene modified electrode

A voltammetric sensor for polydatin sensing was simply fabricated by in-situ electrochemically reducing graphene oxide at a glassy carbon electrode. The redox behavior of polydatin was investigated systematically. For the first time, the kinetics parameters of electrode reaction of polydatin were calculated using various electrochemical techniques. Significant electrochemical signal increases were achieved by the excellent conductivity and large surface area of reduced graphene oxide. Thereafter, a highly-sensitive electroanalytical method for polydatin was established with a good linear relationship from 4.0 × 10− 8 mol L− 1 to 3.5 × 10− 6 mol L− 1 and a detection limit of 4.0 × 10− 8 mol L− 1. In addition, the practical application of present method was demonstrated by determining the concentration of polydatin in real sample with satisfactory result.