▎ 摘　　要

NOVELTY - The sensor has a material identification film fixed on a surface of a working electrode. The material identification film is made of a sulfonated graphene supported palladium composite material and perfluorinated sulfonic acid resin, where the sulfonated graphene supported palladium composite material to disperse water in graphene and adjust pH of solution under ice bath condition to continuously stir, react, filter, wash, dry and obtain the sulfonated graphene loaded palladium composite material. USE - Dopamine sensor for detecting sulfonated graphene supported palladium composite material (claimed). ADVANTAGE - The sensor is simple in structure, and has high selectivity, high reproducibility, high stability, high electrode catalytic performance, strong anti-interference ability, wide detection range and low detection cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a dopamine sensor preparation method. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical view of a dopamine sensor. '(Drawing includes non-English language text)'