The present invention relates to electrochemical sensor, and is especially one kind of polymer membrane ion selective electrode for potential detection in organic phase and its application. The invention relates to a polymer membrane ion-selective electrode capable of being used for potential detection in an organic phase. A hydrogel coating formed by chitosan-polyvinyl alcohol is coated on the surface of a polymer sensitive membrane of the polymer membrane ion-selective electrode. The formed hydrogel coating can effectively improve the surface hydrophilicity of the electrode and reduce the adsorption and permeation of an organic solvent on the surface of the electrode, so that the service life of the electrode in an organic phase is prolonged. The method for improving the service life of the electrode in the organic phase is simple and durable, and enables the electrode to be used in complex media.
; 林朝阳; 秦伟
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