Abstract
With the aim of extending the use of ion-selective electrodes (ISEs) for the thermodynamic investigation of concentrated mixed electrolyte systems based on potentiometry, a mixed solution method (MSM) is reported for the determination of potentiometric selectivity coefficients () of ISEs. In this new method, the measurements are performed simultaneously in the presence of all relevant interfering ions in mixed electrolyte systems. As a result, the determination of is carried out in a realistic matrix environment with composition and ionic strength close to that of real mixed electrolyte samples and under experimental conditions where the ISE reveals its real practical mixed ion response behaviour.
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