▎ 摘　　要

NOVELTY - The method involves dispersing 0.9-1 g of cyclodextrin in 15 ml graphene oxide aqueous solution and 0.4-0.55 mg-ml-1 and ultrasonically dispersing for 10-15 hours. A glass carbon electrode modified solution is prepared by dropping 18-22 ml of graphene oxide and 0-5 g of the electrode modification liquid onto the surface of the glass-carbon electrode surface of infrared heating and dried to obtain a modified glass carbon dioxide electrode. USE - Preparation method of electrochemical sensor for simultaneously detecting ascorbic acid, dopamine and uric acid in aqueous solution. ADVANTAGE - The electrochemical sensor can simultaneously detect ascorbic acid, dopamine and uric acid in aqueous solution in differential voltammetry pulse analysis, thus ensuring the resolution capability of the detection. The modified glassy carbon electrode can amplify the measured signal strength, so as to solve the problem that the low concentration of the solution as well as the detection limit, high sensitivity, and the low-concentration of the recognition acid are difficult to distinguish. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: the following (1) an electrochemical sensor for simultaneously detecting ascorbic acid; and (2) an electrochemical method for simultaneously detecting ascorbic acid. DESCRIPTION OF DRAWING(S) - The drawing shows a graph which shows the differential voltammetry pulse analysis curve of the mixed solution of dopamine and uric acid. (Drawing includes non-English language text).