| 摘要 |
[Problem] To provide, as a means for removing impurity ions from a solution, a column-shaped ion removal device in which an active substance or gas that generates in the vicinity of the electrodes does not come into the system and with which ions to be examined can be taken out with satisfactory detection sensitivity. [Solution] A horizontal column packed with an ion exchanger that adsorbs impurity ions is provided with a solution inlet at the top of the column and near one of the electrodes and with an outlet at the bottom of the column and on the side of the other electrode to configure a narrow liquid channel. An ion-exchange membrane and an ion exchanger are used in combination to form an ion interface at each end of the column, and ions which generate as a result of a shift from water dissociation equilibrium are allowed to move toward the electrodes. Impurity ions to be removed are discharged from the column while regenerating the ion exchanger that adsorbs the impurity ions. In combination therewith, water is introduced externally and passed through the region between each electrode and the corresponding ion-exchange membrane to accelerate the discharge of the gases, the bases and acids, which are impurity ions to be removed, and active substances from the column. |
