▎ 摘　　要

Bi2O3 @ graphene material, fabricated by hydrothermal and self. assembly technology, was used to modify glassy carbon electrode. In this way, the electrochemical reaction activity sites were increased due to high specific surface area, and the pore structure of graphene sheet was favorable of electron transfer. Based on this, a new method for simultaneous determination of trace Pb2+ and Cd2+ was established by using anodic stripping voltammetry. The anodic stripping voltammetry response exhibited linear relationship with concentrations of Pb2+ and Cd2+ in the ranges of 10-200 mu g/L and 25-200 mu g/L, respectively. The detection limits were 0.02 mu g/L and 0.25 mu g/L for Pb2+ and Cd2+, respectively, with a deposition time of 120 s. The Bi2O3 @ graphene. modified glass carbon electrode exhibited high sensitivity, selectivity and stability, and were applied to determine Cd2+ and Pb2+ in real waste water samples, and the results were consistent with those determination results of inductively coupled plasmon. atomic emission spectrometry, indicating the good potential of Bi2O3-modified electrode in detection of trace heavy metal ions.