▎ 摘　　要

A graphene modified electrode for voltammetric determination of concentrations of aluminium(III) in the presence of alizarin has been reported. The modified electrode was characterized by cyclic voltammetry(CV), transmission electron microscopy(TEM), infrared spectrum(FT-IR) and alternating current(AC) impedance experiments. This voltammetric sensor exhibited strong catalytic effect to the oxidation of alizarin in a Tris-HCl buffer solution (0.08M, pH7.5). The measurements were carried out from underaerated solutions with an accumulation time of 2 mins. Other metal ions in low concentration did not interfere with the analysis of Al(III) ions. The decrease of the differential pulse voltammetry(DPV) anodic peak(-0.65V versus SCE) current for alizarin ligand was linear with increasing of aluminum concentrations. The response was linear over the 0.12-1.2 mu M range with a detection limit of 9x10(-8)M. The relative standard deviation at 1x10(-6)M was 3.2% (n= 8). The proposed procedure was validated in the course of Al(III) determination in biological samples.