▎ 摘　　要

NOVELTY - An electrode preparing method involves dispersing reduced graphene oxide (rGO) in anhydrous ethanol ultrasonically to obtain rGO suspension at concentration of 100-2000 mg/l, removing the rGO suspension, and coating dropwise with the amount of 10-30 mu l after activation treatment of screen print electrode (SPE) to obtain SPE/rGO followed by dissolving 0.005-0.025 g beta -cyclodextrin ( beta -CD) and 500-5000 U glucose oxidase (GOx) in each 1 ml of phosphate buffered saline at pH of 6.2-8.0 and scanning the mix solution of SPE/rGO to obtain a SPE/rGO/ beta -CD/GOx electrode. USE - Method for preparing an electrode that is utilized for detecting dopamine. ADVANTAGE - The method enables preparing the electrode with high sensitivity and better selectivity in a simple, rapid and cost-effective manner. DETAILED DESCRIPTION - An electrode preparing method involves dispersing reduced graphene oxide (rGO) in anhydrous ethanol ultrasonically for 0.5-8 hours to obtain rGO suspension at concentration of 100-2000 mg/l, removing the rGO suspension, and coating dropwise with the amount of 10-30 mu l after activation treatment of screen print electrode (SPE) to obtain SPE/rGO followed by dissolving 0.005-0.025 g beta -cyclodextrin ( beta -CD) and 500-5000 U glucose oxidase (GOx) in each 1 ml of phosphate buffered saline at a pH of 6.2-8.0 and scanning the mix solution of SPE/rGO, where the scanning potential range is 0.2-0.8 V to obtain a SPE/rGO/ beta -CD/GOx electrode.