POTENTIAL DIFFERENCE MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a highly accurate analysis method with a minute amount of a sample in a potential difference measurement method.

SOLUTION: Anions in an electrolyte solution are prevented from infiltrating into an ion exchange resin and an ion exchange film of them by electrostatic repulsion to the ion exchange group having an opposite charge. Further, cations are difficult to infiltrate into the ion exchange resin and the ion exchange film by electrostatic repulsion to the ion exchange group having an opposite charge if an ion exchange resin and an ion exchange film having an anion exchange group are arranged side by side therewith. It is considerable that the arrangement of the ion exchange resin and the ion exchange film having the cation exchange group or the anion exchange group in this way can demonstrate an effect for preventing ion transmission. It is considered that an effect on a measurement potential given by ions leaked out of a reference electrode by soaking into a measurement solution can be reduced by providing a region obtained by laminating the ion exchange resin or the ion exchange film between the reference solution and the measurement solution.

COPYRIGHT: (C)2012,JPO&INPIT