▎ 摘　　要

NOVELTY - A graphene-single-walled carbon nanotube-nano-ruthenium complex-modified sensing electrode comprises electrode body and modification covered on the surface of the electrode body, where the modification is composite, and the composite comprises graphene, single-walled carbon nanotubes and nanometer ruthenium. USE - Graphene-single-walled carbon nanotube-nano-ruthenium complex-modified sensing electrode for use in electrochemical sensor that is utilized for content of metronidazole and ciprofloxacin. (all claimed). ADVANTAGE - The graphene-single-walled carbon nanotube-nano-ruthenium complex-modified sensing electrode improves the accuracy of electrochemical measurement, better resolution and peak shape. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a graphene-single-walled carbon nanotube-nano-ruthenium complex-modified sensing electrode.