▎ 摘　　要

Split aptamers are fragments of the parent aptamer which still possess binding ability to its target. They have shown great potential in the development of aptasensors. In this study, a fluorescence aptasensor was constructed employing the split aptamer as a cooperative recognition molecular probe and Graphene Oxide nanosheets (GO) as a quencher for rapid detection of kanamycin in chilled pork. Under optimal conditions,the proposed biosensor showed a good linear relationship in the range of 0.5-50 nM with the detection limit of 0.36 nM. The recoveries of the actual samples ranged from 97.6 to 103.5%. Furthermore, the test can be completed in 25 min. This study provides good reference for developing simple, economical, and rapid assay for other small molecular targets detection.