Comparison of different methods for determining the selectivity coefficient using a magnesium-selective electrode

Determination of the selectivity coefficient of a chloride ion selective electrode in alkaline media simulating the cement paste pore solution

“…It is possible to obtain from literature [20] numerical values for the fccr.otr of ISEs based on solid AgCl membranes, which are approximately 10~2. Nevertheless, several authors [20][21][22][23][24] lay stress on the fact that the measured values of the selectivity coefficients of a given ISE, and even its preference for a given species, may be dependent on the procedures and experimental conditions used for their determination. This is especially true in cases where the ISE does not exhibit Nernstian response for both the primary and the interfering ions [22,25].…”

Atropine-selective Membrane Electrodes and Relative Selectivity Concept

“…Some compared between methods of determination of the selectivity coefficient of ion-selective electrodes. 25,26 Others studied the parameters that affect the selectivity coefficient values. 27,28 Siswanta et al 29 put a computer program for an evaluation and graphical representation of the selectivity coefficient.…”

Studies on the Matched Potential Method for Determining the Selectivity Coefficients of Ion-Selective Electrodes Based on Neutral Ionophores: Experimental and Theoretical Verification

“…[8][9][10][11][12][13][14][15]32 Selectivity coefficients obtained with the MPM reflect the extent of the interference of the practically observed response to the primary ion from various interfering ions. However, it has been pointed out that the MPM is not bound by any model assumption, and therefore the values of the MPM-selectivity coefficient in general lack a predictive ability about the membrane potentials measured with solutions other than those for which it was determined.…”

“…However, it has been pointed out that the MPM is not bound by any model assumption, and therefore the values of the MPM-selectivity coefficient in general lack a predictive ability about the membrane potentials measured with solutions other than those for which it was determined. 9,32 In addition, the values of the MPM selectivity coefficient are highly concentration dependent in the case of primary and interfering ions of different charge (zA ≠ zB). Therefore, the determined MPM selectivity should be used not as "coefficient", but as "factor".…”