▎ 摘　　要

NOVELTY - A molecularly imprinted electrochemical sensor comprises a working electrode, where a surface of the working electrode is coated with a layer of graphene/ruthenium nanoparticles and layer of molecularly imprinted polymers. USE - Molecularly imprinted electrochemical sensor for detecting diphenylamine (claimed). ADVANTAGE - The molecularly imprinted electrochemical sensor has better conductivity and catalytic property of graphene/ruthenium nanoparticles, better adsorptive performance to diphenylamine when diphenylamine is utilized as template molecule, high selectivity, specific selectivity of imprinted material and wide detection limit of 0.02 mu M, and is less susceptible to interference.