▎ 摘　　要

A graphene quantum dots@nano-carbon ionic liquid electrode was prepared (GQDs@nano-CILE) to detect rutin sensitively. The graphene quantum dots were characterized by transmission electron microscopy (TEM) and infrared spectroscopy (IR). The surface morphology of the modified electrode was studied by scanning electron microscope (SEM). Cyclic voltammetry (CV) was used to investigate the electrochemical properties and the effective surface area of the modified electrodes. The effects of solution pH value, accumulation potential, and time on peak current were also discussed. Compared with nano-carbon paste electrode (nano-CPE), the peak current of rutin on GQDs@nano-CILE increased significantly using differential pulse voltammetry (DPV). The linear range of rutin ranging from 5 x 10(-9) to 1 x 10(-5) mol L-1 was obtained under the optimized conditions. The detection limit was 2 x 10(-9) mol L-1 (S/N = 3). The modified electrode could be used for rutin analysis in rutin tablets and urine samples, and the recovery was between 95.2 and 101.4%.