▎ 摘　　要

The proposed chemically modified electrode was graphene oxide that was synthesized via Hummer's method followed by reduction of antimony film by in-situ electrodeposition. The experimental process could be concluded in three main steps: preparation of antimony film, reduction of analyte ions on the electrode surface and stripping step under the conditions of square wave anodic stripping voltammetry (SWASV). A simple and rapid approach was developed for the determination of heavy metals simultaneously based on a sequential injection (SI), an automated flow-based system, coupled with voltammetric method using antimony-graphene oxide modified screen-printed carbon electrode (SbF-GO-SPCE). The effects of main parameters involved with graphene oxide, antimony and measurement parameters were also investigated. Using SI-SWASV under the optimal conditions, the proposed electrode platform has exhibited linear range from 0.1 to 1.5M. Calculated limits of detection were 0.054, 0.026, 0.060, and 0.066 M for Cd(II), Pb(II), Cu(II) and Hg(II), respectively. In addition, the optimized method has been successfully applied to determine heavy metals in real water samples with acceptable accuracy of 94.29 - 113.42% recovery.