Abstract
The complex impedance spectra of NASICON Na + ion-sensitive membrane contacted with solutions of different concentrations of the primary ion and of the main interfering ions (Li +, K +, Ca 2+ and H 3O +) were measured over the range 65 kHz–0.01 Hz. The impedance data can be correlated to the potentiometric selectivity coefficients determined by the separate solution method for 0.1 M solution.
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