Abstract: The transfer of ReO_4~-, IO_4~- and MnO_4~- anions across the water/nitrobenzene interface was investigated by cyctic voltammetry with four electrode system. The transfer process of these anions is ascribed to the diffusion-controlled under the experimental conditions. The linear relationship between the peak current and concentration of these anions in aqueous phase can be used for analysis and monitoring the chemical reaction between IO_4~- and N (C_2H_4OH)_3.