▎ 摘　　要

NOVELTY - An ionic liquid functionalized graphene modified glassy carbon electrode preparation method involves preparing a turbid mixture, cooling the mixture and adding water to the mixture. Hydrogen peroxide is added to the resulting mixture and filtered to obtain a graphene oxide. Potassium hydroxide is added to the graphene oxide and ultrasonically treated and stirred. The resulting product is centrifuged, washed and dried to obtain a graphene oxide dispersion liquid. Distilled water is added to the graphene oxide dispersion liquid, dispersed in a glassy carbon electrode, washed and dried. USE - Method for preparing an ionic liquid functionalized graphene modified glassy carbon electrode that is utilized for detecting 5-hydroxytryptamine and dopamine contents. ADVANTAGE - The method enables preparing the graphene modified glassy carbon electrode in a simple manner with good electro-catalytic activity, and detecting the 5-hydroxytryptamine and dopamine contents using the electrode in a rapid and convenient manner with high sensitivity. DETAILED DESCRIPTION - An ionic liquid functionalized graphene modified glassy carbon electrode preparation method involves adding the graphite to concentrated sulfuric acid under lower ice bath condition, continuously stirring the solution, and adding sodium nitrate and potassium permanganate to obtain turbid mixture. The mixture is cooled to room temperature and water is added to the mixture for 15 minutes at 25 degrees C. Hydrogen peroxide is added to the resulting mixture and filtered to obtain a graphene oxide. Potassium hydroxide is added to the graphene oxide and ultrasonically treated and stirred at 80 degrees C for 24 hours. The resulting product is centrifuged, washed using water and anhydrous ethanol, and dried to obtain a graphene oxide dispersion liquid. Distilled water is added to the graphene oxide dispersion liquid and dispersed in a glass carbon electrode as a working electrode. The glassy carbon electrode is taken out and washed with distilled water and dried to obtain the graphene modified electrode.