The results of voltammetry without any probe and capacitance measurement show that at the weight ratio of H_2O/n-C_5H_(11)OH = 50/50, when total SDS concentration is less than 3%, the upper phase takes on the W/O structure and the lower phase takes on the O/W structure. With the increase of the total SDS content, increase the amount of SDS at the interface, interfacial potential ΔE, interfacial capacitance C, and interfacial charge-transfer current i_p, while decreases the interfacial resistivity ρ_i; after SDS total content reaches 3%, the upper phase takes on the W/O structure and the lower phase takes on the bicontinuous structure, the changes of all the electric properties of the interface slow down.

Key words: VOLTAMMETRY, MICROEMUSION, CHARGE TRANSFER, ELECTRICAL RESISTIVITY, CAPACITANCE