Solid-Phase extraction of polycyclic aromatic hydrocarbons from water samples using CTAB-TIO2 modified nanotubes

•A modified CTAB-TiO2 was applied for the SPEof PAHs from water samples.•TiO2 nanotubes were elaborated by the alkaline hydrothermal process.•The type of elution solvent, sample pH and volume, and concentrations significantly affect extraction yield.•Maximum extraction efficiency was found for pH values of the CTAB solution between 8 and 9.•Higher extraction efficiencies were obtained for the majority of PAHs when using a sample volume of 100 mL.