Amperometric detection of diclofenac at a nano-structured multi-wall carbon nanotubes sensing films

Abstract COOH-functionalized multi-walled carbon nanotubes ( f -MWCNTs) film coated on glassy carbon electrode (GCE) were prepared, and the detection of diclofenac (DCF) was investigated on by cyclic voltammetry and amperometry. The results showed that the nano-structured electrodes exhibit good analytical performances towards the electrochemical oxidation of DCF with a detection limit of 0.1 μM and a sensitivity of 0.06 μA. μM −1 within a dynamic concentration range varying from 2 μM to 15 μM.