Hydroquinone modified chitosan/carbon film electrode for the selective detection of ascorbic acid

► Synthesis and characterization of hydroquinone linked chitosan (Cs-Q) polymer. ► Preparation of electroactive porous composite made of Cs-Q polymer with carbon nanoparticles. ► Facile and selective electrooxidation of ascorbic acid in the presences of the interferences, dopamine and uric acid.