A New Method for Puerarin Determination Based on Poly (Alizarin Red S/Graphene) Modified Electrode

Weili Zhang
2016 International Journal of Electrochemical Science  
A poly(alizarin red S/graphene) (PARS-GR) composite membrane modified glassy carbon electrode was constructed by a facial one step electrodeposition method. The surface morphology and electrochemical characteric of the modified electrode were investigated carefully by the assistance of scanning electron microscopy and cyclic voltammetry, respectively. The electrochemical behavior of puerarin was investigated by cyclic voltammetry and a oxidation peak appeared at +0.61 V (vs. SCE) in pH 6.5
more » ... hate buffer solution. The PAR-GR/GCE displayed satisfactory electrochemical properties including higher conductivity and lower electron flowing resistance. The oxidation process of puerarin on PAR-GR/GCE surface is calculated to be a one-electron and one-proton transfer process. Under the optimized experimental conditions, the oxidation peak current showed good linearity with puerarin concentration under the range of 1.0×10 -7~7 .5×10 -4 mol/L accompanied by a detection limit of 3.4×10 -8 mol/L (3σ). The modified electrode was successfully utilized to examine the puerarin samples with satisfactory results.
doi:10.20964/2016.12.60 fatcat:6slh4vyyrbboldyh3phb26rugu