▎ 摘　　要

Graphene, grow on platinum electrode (prepared with the method of micro-electromechanical system) with CVD, was used in combination with in situ plated bismuth film electrode for fabricating the enhanced electrochemical sensing platform to determine trace cadmium (Cd2+) and lead (Pb2+) by differential pulse anodic stripping voltammetry (DPASV). The sensor is three-electronic system that consisted of graphene-modified platinum (G/Pt) working electrode, Ag/AgCl reference electrode and platinum wire auxiliary electrode. The experiment result showed that the sensor performed well in simultaneously detecting Cd2+ and Pb2+. The linear calibration curves ranged from 0.05 mg/L to 10 mg/L for Cd2+ and 0.03 mg/L to 5 mg/L for Pb2+. The detection limits were estimated to be around 10 mu g/L for Cd2+ and Pb2+. This method is simple, safe, fast and good reproducibility, and can be used for rapid detection of Cd and Pb in wastewater, surface water and domestic water.