| 摘要 |
PURPOSE:To obtain an uranyl-ion exchanged liquid-film type electrode characterized by excellent concentration response, reproducibility, accuracy and durability, by providing at least one compound selected among LiCl, CsCl, KNO3, Mg(NO3)2 and the like as an inner liquid in contact with a sensitive film together with uranyl ions. CONSTITUTION:As an uranyl-ion exchanged liquid-film type electrode, a sensitive film, which is obtained by treating a film forming base material with the following three kinds of reagents, is used: an ion exchange body comprising one or two or more kinds of the uranyl-ion complexes of neutral ester phosphate or neutral ester phosphite; a diluent, whose compatibility with said ion exchange body is excellent; and a solvent, whose affinity with the film forming base material is excellent. As an inner reference electrode, silver/silver chloride electrode is used. As an inner liquid in contact with said sensitive film, at least one kind of compound selected among LiCl, CsCl, KNO3, Mg(NO3)2 or Sr(NO3)2 is made to coexist together with the uranyl ions. Thus, the electrode characterized by excellent uranyl-ion selectivity, concentration response and the like and a long life is obtained. |
