Preparation of molecular imprinted film based on chitosan/nafion/nano-silver/poly quercetin for clenbuterol sensing

► Nano-Ag could catalyse the redox of clenbuterol. ► Molecular imprinted film consisted of biopolymer chitosan, inorganic nano-Ag and poly quercetin. ► Electrochemical preparation of the molecular imprinted film. ► Clenbuterol determination in practical samples at the molecular imprinted film.