| 摘要 |
PURPOSE:To provide a method for measuring simple and accurate selectivity coefficient. CONSTITUTION:When a selectivity coefficient is measured from an output potential of an ion selective electrode by using first, second and third standard liquids in which concentrations are already known, a ratio of a concentration of ions to be measured of the selective electrode in the first liquid to that of disturbing ion having the same ionic valency as that of ions to be measured is made equal to a ratio of a concentration of the ion to be measured of the electrode in the second liquid to that of the disturbing ion having the same ionic valency as that of the ion to be measured, and a ratio of the concentration of the ion to be measured of the electrode in the third liquid to that of the disturbing ion having the same ionic valency as that of the ion to be measured is differentiated. |
