▎ 摘　　要

NOVELTY - The method involves using a modified glassy carbon electrode using a graphene oxide/bismuth film for detecting trace heavy metal in a working electrode. A graphene oxide solution is taken and mixed with graphene oxide solution. USE - Method for detecting trace heavy metal in a modified glassy carbon electrode. ADVANTAGE - The method enables preplating bismuth film modified glassy carbon electrode. The method ensures better sensitivity. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a trace heavy metal detecting method. '(Drawing includes non-English language text)'