▎ 摘　　要

NOVELTY - A carbon nanotube-graphene composite membrane-modified electrochemical sensor consists of a glassy carbon electrode, and a carbon-nanotube-modified graphene composite film layer on the surface of glassy carbon electrode. USE - Carbon nanotube-graphene composite membrane-modified electrochemical sensor is used for detecting dopamine (claimed). ADVANTAGE - The carbon nanotube-graphene composite membrane-modified electrochemical sensor enables detection of dopamine in the presence of lot of ascorbic acid, exhibiting excellent electrocatalytic oxidation activity on detection of dopamine. The sensor has quick response speed, wide linearity range, low detection limit, excellent reproducibility, high stability, and no interference of coexisting electroactive materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of carbon nanotube-graphene composite membrane-modified electrochemical sensor.