Determination of phenol in soil sample as an environmental pollution using aminophenol modified glassy carbon sensor electrode

摘要

In this paper, a simple and sensitive method for the electrochemical determination of phenol in soil sample using disposable screen-printed glassy carbon (GC) electrode surface modified with an electrografted aminophenol film, via the electrochemical reduction of its prepared aminophenol diazonium salt in non-aqueous media, is presented. 1 mM of aminophenol diazonium salt (APDAS) in 100 mM tetrabutylammonium tetrafluoroborate (TBATFB) was used for modification of GC electrode surface in this study. The surface modification of GC electrode was performed with aminophenol (AP) using cyclic voltammetry (CV), whereas the characterization of this sensor electrode was performed using CV and electrochemical impedance spectroscopy. The modification process was carried out in non-aqueous media, whereas phenol determination was carried out in aqueous media. Acetonitrile (MeCN) for providing non-aqueous condition and Britton-Robinson (BR) buffer solution at pH 10 and 100 mM KCl solution for providing aqueous condition were used. As the final of this study, a reaction mechanism was suggested for the binding of phenol to aminophenol modified GC electrode surface. 0.1316 mgL~(-1) phenol was determined in soil sample by using AP modified GC electrode.