| 摘要 |
Provided is a combination electrode for ion concentration measurement including a glass electrode and a reference electrode, which is made capable of stably measuring ion concentration by preventing the leakage and entering of a reference electrode internal solution to a portion above a sealing means of a reference electrode chamber, and thereby by securing the insulation between a glass electrode internal electrode and a reference electrode internal electrode. The combination electrode for ion concentration measurement, includes a glass electrode and a reference electrode whose internal electrode is made of silver-silver chloride, wherein: a sealing means configured to seal an upper surface of a reference electrode chamber formed in an outer tube which houses an internal electrode and an internal solution of the reference electrode and around a glass support tube penetrating the outer tube along a substantially center axis thereof includes an annular silver member which the glass support tube penetrates along a center axis thereof and annular sealing elastic members for liquid-tightly sealing a space between the silver member and the glass support tube, and a space between the silver member and the outer tube, respectively; and the reference electrode internal electrode is connected to a terminal for a reference electrode through the silver member. |
