Research on the Response Characteristics of Conductive Polymerization of Selective Electrode for Marine Pure Water

Abstract

There are many problems with traditional solid-state ion electrodes, such as unstable, long response time, etc. In this paper, a glassy carbon electrode was used as the conductor, and poly-ethylenedioxythiophene (PEDOT) was used as the conductive polymer layer. A new type of trace ion all-solid-state electrode was prepared by combining the sensitive membrane of the working electrode with a drop-coating method. In order to meet the needs of soft water online detection, which is important to the marine nuclear power plant, chloride ion working electrode and nitrate ion working electrode had been developed. The electrode capacitance, resistance characteristics, repeatability, detection limit, response time, selectivity coefficient, and temperature influence have been experimented. Compared with the solid station electrode without conductive polymer layer, the electrode with conductive polymer improved resistance and capacitance characteristics, improved stability and repeatability, reduced response time. The average detection error of ion select electrodes on soft water was less than 5% according to the result.