▎ 摘　　要

NOVELTY - Electrochemical immunosensor comprises a surface modified electrode where the electrode is a glassy carbon electrode coated with carboxy-functionalized multilayer graphene matrix for immunodetection of label-free antibody conjugates. USE - Electrochemical immunosensor. ADVANTAGE - Electrochemical immunosensor has rapid and essentially diagnostic tools, analytical quality, easy operation, and cost-effectiveness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for immunodetection of antibody conjugates which involves contacting body fluid containing the analyte with a surface modified electrode coated with carboxy-functionalized multilayer graphene matrix, where the analyte binds to the binding agent to form a label-free antibody conjugate.