The present invention addresses the problem of improving both ion-selective electrode stability and adhesion between a sensitive film and a casing. This ion-selective electrode is characterized by being provided with: a sensitive membrane containing an ion-selective substance, a substrate, and a plasticizer; and a casing that holds the sensitive membrane, and by the casing material containing a substance having a solubility parameter (SP value) of 19.5 to 21.5.
本发明要解决的问题是提高离子选择电极的稳定性以及敏感膜与外壳之间的附着力。这种离子选择电极的特点是:具有含有离子选择物质的敏感膜、基板和
增塑剂;以及固定敏感膜的外壳,外壳材料含有溶解度参数(
SP 值)为 19.5 至 21.5 的物质。