Electrochemical sensor based on molecularly imprinted film at polypyrrole-sulfonated graphene/hyaluronic acid-multiwalled carbon nanotubes modified electrode for determination of tryptamine

► A molecularly imprinted electrochemical sensor was developed for tryptamine studied. ► PPy-SG and HA-MWCNTs nanocomposite were used in the experiment. ► Different experimental parameters were studied. ► Determination of tryptamine in practical samples showed good recovery.