ELECTROCHEMICAL-BEHAVIOR OF N-PHENYLCINNAMOHYDROXAMIC ACID INCORPORATED INTO CARBON-PASTE ELECTRODE AND ADSORBED METAL-IONS

The voltammetric properties of N-phenylcinnamohydroxamic acid (PCHA) a t a glassy carbon electrode in acetonitrile solutions and PCHA incorpo rated into carbon paste electrodes (CPE) in aqueous solutions have bee n examined by cyclic voltammetry (CV) and differential pulse voltammet ry (DPV). The redox behavior of PCHA in acetonitrile showed electron t ransfer process followed by chemical reaction. The voltammetric behavi or of PCHA modified CPE in aqueous solution (0.25 M sodium acetate) wa s found to be a function of pH. The voltammetric behavior of PCHA inco rporated CPE was also studied in the presence of vanadium(V), iron(III ), and uranium(VI). A linear relationship was observed between the DPV peak current of PCHA and the concentration of vanadium(V) while the p eak current of PCHA was found to be an exponential function of the con centrations of iron(III)) and uranium(VI).