Ion selective electrode and method of preparation thereof

摘要

An integral ion selective electrode for analysis of a potassium ion, etc., comprising: (I) a support; (II) an electroconductive metal layer such as a silver metal layer; (III) a layer of a water-insoluble salt of said metal such as a silver chloride layer; (IV) an electrolyte layer which comprises electrolyte salt of a sodium ion with the same anion as the anion of the water-insoluble salt, said electrolyte salt having a mean crystal size of not more than 8 mu m, and said electrolyte layer being substantially free from a binder; and (V) an ion selective layer selected from the group consisting of a potassium ion selective layer, a halogen ion selective layer and a carbonate ion selective layer.