Analysis of multiple-phytohormones during fruit development in strawberry by using miniaturized dispersive solid-phase extraction based on ionic liquid-functionalized carbon fibers

•Carbon fibers modified with ionic liquid was prepared as SPME fiber.•Simultaneous determination method of phytohormones by LC–MS/MS was developed.•Phytohormones were determined during different development stages in strawberries.•Level Changes and roles of phytohormones in strawberries were studied.