▎ 摘　　要

NOVELTY - An ionic liquid based composite material comprises molybdenum disulfide and graphene oxide. USE - Ionic liquid based composite material for use in modified electrode of electrochemical sensor that is utilized for detection of chloramphenicol in eye drops, milk and urine samples (all claimed). ADVANTAGE - The sensor has better stability, repeatability and reproducibility. DETAILED DESCRIPTION - A ionic liquid based composite material comprises molybdenum disulfide and graphene oxide (MoS2-IL/GO), where IL is 1-butyl-3-methylimidazolium tetrafluoroborate. INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing an ionic liquid-based composite material, which involves adding molybdenum disulfide and 1-butyl-3-methylimidazolium tetrafluoroborate to dimethylformamide, ultrasound for 15 hours, adding molybdenum disulfide and 1-butyl-3-methylimidazolium tetrafluoroborate to the graphene oxide, placing the mixture at room temperature, ultrasound for 30 minutes, centrifuging, using water to wash the black object and again dispersed in dimethylformamide to obtain product (2) a modified electrode (3) an electrochemical sensor comprising the glassy carbon electrode (4) use of electrochemical sensor for detection of chloramphenicol.