Effects of solvent and concentration of supporting electrolyte on electrochemical measurements: Detection of catechol

Abstract

Effect of electrolyte concentration and solvent composition on electrochemical measurements of catechol are reported. In cyclic voltammetric and amperometric experiments, anhydrous lithium chloride was used as the electrolyte; 98% acetonitrile and distilled water were used in mixed solvent systems. The maximum peak current was obtained at 0.075 mol dm-3 LiCl concentration in experiments conducted in aqueous catechol solutions. In amperometric studies, in mixed water/acetonitrile solvent systems, the peak current for catechol reduction/oxidation was higher in solutions with a higher acetonitrile concentration.