Electrochemical determination of diclofenac using boron-doped diamond electrode

Abstract

The electrochemical behavior of sodium diclofenac (DCF) was investigated on boron doped diamond (BDD) electrode in 0.1 M Na2SO4 supporting electrolyte. The oxidation process, kinetics, and useful parameters for DCF detection were studied by cyclic voltammetry (CV) technique. The oxidation peak at about +0.7 v/sce was selected for amperometric/voltammetric detection of DCF. The linear dependences of the current versus DCF concentrations were reached for the concentration range between 0.31 and 31.1 µM by using cv, chronoamperometry (CA), square-wave voltammetry (SWV) and differential-pulsed voltammetry (DPV). The sensitive, simple and time saving voltammetric procedure was developed, optimized and tested on spiked tap water sample.