Abstract: A graphene modified glassy carbon electrode was fabricated for the determination of catechol. The electrochemical behaviors of the modified electrodes were investigated by cyclic voltammetry(CV). The influence of the solution pH on the modified electrode was studied by differential pulse voltammetry(DPV). It was found that there was a good linear relationship between the response current and the concentration of catechol over the range from 5.0×10-8 to 5.6×10-4 mol/L, with the correlation coefficient of 0.9919 and the detection limit of 6.68×10-9 mol/L(S/N=3). Compared with other modified electrode, the graphene modified glassy carbon electrode was convenient to prepare, and it exhibited a fast response time and longterm stability, and could be used in the determination of catechol.

Key words: graphene, determination, differential pulse voltammetry, cathol