Functionalized multiwalled carbon nanotubes through in situ electropolymerization of brilliant cresyl blue for determination of epinephrine

In this work, a polymeric brilliant cresyl blue (BCB) and dihexadecyl phosphate (DHP) dispersed Multi-walled carbon nanotubes (MWNTs) composite film modified glass carbon electrode (PBCB-MWNTs-DHP/GCE) denoted as epinephrine (EP) sensor was prepared by an in-situ electropolymerization method. The electrochemical response of EP at the sensor is much better. Voltammetric investigations indicated that the improved response of EP at the sensor mainly arose from the enhanced adsorption of EP at PBCB-MWNTs-DHP film, perhaps through the hydrogen bonding and pi - pi interactions between EP and PBCB. The sensor was applied to the determination of EP in injection by a standard addition method and the results were satisfied.