Graphene oxide-functionalized mesoporous silica for online in-tube solid-phase microextraction of polycyclic aromatic hydrocarbons from honey and detection by high performance liquid chromatography-diode array detector

•Mesoporous silica was functionalized with graphene oxide for in-tube SPME.•The material displayed good extraction effect to polycyclic aromatic hydrocarbons.•Online detection of PAHs was achieved through combining in-tube SPME with HPLC-DAD.•The analytical method successfully determined trace PAH targets from honey samples.•The method was superior to some methods based on other adsorbents.