Analyzer and ion activity measuring method null for ion activity measurement

摘要

PURPOSE:To provide accurate measurement of ion activity without requiring a measuring instrument to which a porous bridge is provided in advance by causing an analyzer itself to mount the bridge on the measuring instrument before or after a drop of a reference liquid or a sample liquid is attached. CONSTITUTION:A support 10 is provided with a slide feed portion 11, a liquid drop attaching portion 12, a discharge portion 13, a potential measuring probe assembly 14 which is allowed free vertical motion, a slide shifting lever 15 and a bridge feed means 16 for feeding bridges to a measuring instrument. The means 16 has a supply roll 51 and a take-up roll 52 provided above both sides thereof and a porous bridge 53 is wound between the rolls 50, 51. An ion activity measuring instrument 20 on which the bridge 53 is not mounted is located at the attaching portion 12 and the bridge 53 which is not yet used is installed before or after a liquid drop is attached. The instrument 20 on which the bridge 53 is not mounted is used and the bridge 52 is mounted on the instrument 20 before or after a drop of a reference liquid or the like is attached to the instrument 20.