PURPOSE: To detect with high accuracy a univalent cation, namely, an alkali metallic ion and an ammonium ion by combining an ion electrode containing a neutral carrier as an induction object, and a reference electrode.
CONSTITUTION: A neutral carrier which is useful as a sensitive material is cyclic peptide, cyclic polyether, or nactine, etc. An ion electrode is a polymer mixed film electrode, namely, a covered wire electrode, and consists of a metallic wire 1, a tube 2 of polyvinyl chloride, and a sensitive film 3 formed on the tip of the metallic wire 1. An ion electrode 15 and a reference electrode 8 are incorporated in a potential difference detector. For example, the reference electrode 8 silver - silver chloride electrode containing saturated KCl, measures EMF (mV) generated between two electrodes by a pH/mV meter, and records its variation in a recorder in the shape of an ion chromatograph.
SUZUKI KOUJI
ARIGA HIROSHI
SUZUKI KOUJI
SHOWA DENKO KK