Investigation of the applicability of highly ordered TiO2 nanotube array for enrichment and determination of polychlorinated biphenyls at trace level in environmental water samples

► Investigate the applicability of ordered TiO2 nanotube arrays for the enrichment of PCBs. ► Establish a micro-solid phase equilibrium extraction for the enrichment and determination of PCBs. ► TiO2 nanotube arrays could be reused for over 200 times without lost of the extraction efficiency.