Graphene /ZnO nanocomposite for voltammetric sensing of vitamin B6 using modified glassy carbon electrode

A convenient,low cost,and sensitive electrochemical method,based on a glassy carbon electrode modified with graphene/zno nanocomposite is described for determination of vitamin b6. the modified electrode exhibited good electrochemical properties toward the oxidation of vitamin b6. the diffusion coefficient (d=1.89×10-5 cm2 s-1),and the kinetic parameter such as the electron transfer coefficient,(α=0.53) of vitamin b6 oxidation at the surface of modified electrode was determined using electrochemical approaches. the anodic peak currents of vitamin b6 were found to be linear in the concentration range of 1.0–16000.0 μm with the detection limit of 7.2×10-7 m. © 2016 by cee (center of excellence in electrochemistry).