▎ 摘　　要

NOVELTY - Three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate composite modified electrode comprises an electrode and three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate composite modified on the surface of the electrode, where three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate mixed suspension is coated on the surface of the electrode and dried to obtain the product. USE - The three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate composite modified electrode is used for electrochemical chiral identification. Uses include but are not limited to medicine, pesticide, food additive, human and environment. ADVANTAGE - the method: is simple, the stability is high, and the chirality recognition effect is good. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a method for preparing three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate composite modified electrode comprising (1) taking the designed amount of GO dispersed in the deionized water, ultrasound, adding L-cysteine and ferric chloride hexahydrate into the solution, quickly dropping ammonia water, heating the mixture, cooling to room temperature, repeatedly magnetic hysteresis separation, deionized water, freezing and drying to obtain the 3D-rGO-Fe3O4 powder, (2) taking proper 3D-rGO-Fe3O4 powder to prepare dispersion liquid, using 1-ethyl-(3-dimethylaminopropyl)-carbodiimide hydrochloride and Nhydroxysuccinimide activated 3D-rGO-Fe3O4 carboxylic acid group, dispersing in mixed solution of CS and SA with mass ratio of 1: 1, ultrasonic, stirring to obtain 3D-rGO-Fe3O4-CS-SA suspension, and (3) preparing 3D-rGO-Fe3O4-CS-SA modified electrode: taking proper 3D-rGO-Fe3O4-CS-SA suspension drop on the electrode surface, drying under the infrared lamp to obtain the 3D-rGO-Fe3O4-CS-SA modified electrode; and a method of using three-dimensional reduced graphite oxide, ferroferric oxide, and chitosan alginate composite modified electrode comprising taking R-/S-2-amino-1-(4-nitrophenyl)-1,3 propanediol and placing it in a volumetric flask, adding phosphate buffer saline , shaking well to get the enantiomer solution, soaking 3D-rGOFe3O4-CS-SA composite modified electrode in the enantiomer solution, taking it out, and drying it under the infrared lamp, the 2-amino-1-(4-nitrophenyl)-1,3 propanediol enantiomer electrode, adopting three-electrode system, 2-amino-1-(4-nitrophenyl)-1,3 propanediol enantiomer electrode as the working electrode, and using platinum sheet electrode as the counter electrode, using saturated calomel electrode as the reference electrode, immersing the three-electrode system in the prepared 0.1 M potassium ferricyanide solution at room temperature for differential pulse testing with the potential range of -0.2-0.6 V.