▎ 摘　　要

NOVELTY - Preparing nickel-cobalt oxide-graphene complex comprises (1) dispersing polyvinylpyrrolidone (PVP), nitrogen-doped graphene oxide (N-GN), nickel nitrate hexahydrate, cobalt nitrate hexahydrate, and sodium acetate trihydrate evenly in ethylene glycol in the ratio of 0.25-0.75:1:0.0025-0.0045:0.0025-0.0045:0.005-0.007:0.8-1.2, stirring for 20-40 minutes to obtain a uniformly dispersed precursor suspension, and (2) transferring precursor suspension to the reactor, reacting at 160-200 degrees C for 14-18 hours to obtain black product, centrifugally washing, vacuum drying at 60 degrees C for 6-15 hours to obtain nickel-cobalt oxide-graphene complex. USE - The complex is useful for coating glassy carbon electrode for detection of sodium sulfite (claimed). ADVANTAGE - The electrode: has good electrical conductivity, large specific surface area, good catalytic and detection performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a nickel-cobalt oxide-graphene complex; (2) glassy carbon electrode coated with nickel-cobalt oxide-graphene complex; and (3) preparing a glassy carbon electrode comprising dispersing 1 mg nickel-cobalt oxide-graphene complex in 1 ml deionized water, homogenizing with ultrasound to obtain a suspension, coating suspension on the glassy carbon electrode and drying naturally to obtain modified glassy carbon electrode.