▎ 摘　　要

Nitrogen-doped (NG) graphene modified lassy carbon electrode was prepared for sensitive electrochemical investigation on lead ion (Pb2+) with differential pulse anodic stripping voltammetry. Due to the large surface area, excellent conductivity and good adsorption ability of NG nanosheet, Pb2+ can be accumulated and detected with enhanced voltammetric response in the concentration range from 9.0x10(-9) mol/L to 9.0x10(-5) mol/L. The detection limit was calculated as 1.91 x10(-9) mol/L and the proposed method was applied to fish powder sample determination.