Superficially capped amino metal-organic framework for efficient solid-phase microextraction of perfluorinated alkyl substances

•A highly hydrophobic MOF was prepared by capping phenylsilane group on the surface.•Faster extraction kinetics and higher EFs were achieved by the self-prepared fiber.•The hydrophobic force of NH2-UiO-66-(Zr)-hp improved the adsorption towards PFASs.•The prepared fiber was used for the analysis of trace PFASs in real water samples.