FLUORIDE ION SELECTIVE ELECTRODE USING SUPERIONIC CONDUCTIVE THREE-DIMENSIONAL COMPOUND AS BASE AND MANUFACTURE THEREOF

摘要

PURPOSE: To make it possible to reduce the cost and improve the sensitivity by using a film of active component comprising a specified ternary compound as a fluoride ion-selective electrode, for easier manufacture. CONSTITUTION: As a film to be used for a fluoride ion-selective electrode, an Mx Lny F3-x type ternary compound is used. Here, M is alkaline earth metal ion or calcium, strontium or barium. Ln is, as an active component, lanthanum group metal ion or lanthanum, cerium, proceodymium, neodymium, promethium, samarium or eropium. And, y equals to (1-x).