▎ 摘　　要

NOVELTY - Preparing high-sensitivity electrode comprises e.g. polishing the glassy carbon electrode by gamma-alumina suspension of 0.5 microm and 0.05 microm granularity to remove dirt on the surface of glassy carbon electrode, then orderly using water, acetone, ethanol to ultrasonically clean the glassy carbon electrode after polishing for 2-3 minutes, repeating the ultrasonic cleaning for 2 times, uniformly mixing 0.5-1 g graphene and 1 1.5-3 ml butyl-3-methyl imidazole-hexafluorophosphate ion liquid in the agate mortar to obtain black viscous liquid, then centrifuging, and removing the upper transparent liquid collecting the lower layer of the black paste, obtaining the graphene-ion gel liquid, coating paste on the surface of glassy carbon electrode, subjecting the obtained platinum-gold alloy nano-particle modified electrode for secondary distilled water washing, and naturally drying, replacing glassy carbon electrode by conductive glass indium tin oxide sheet. USE - The high-sensitivity electrode is useful for detecting formic acid for rubber, medicine, dye and leather. ADVANTAGE - The method: provides high-sensitivity electrode with economical and high response sensitivity.