Al. Smirnova et al., Effect of simultaneous existence of two ion-exchangers with opposite charges of lipophilic groups, ELECTROANAL, 11(10-11), 1999, pp. 763-769
The effect of simultaneous existence in PVC membrane of both anion- and cat
ion-exchanger taken in optimal molar ratio is shown for cation-selective me
mbranes containing calcium (ETH 129, ETH 5234) and magnesium (ETH 5214, ETH
4030) ionophores. The presence of cation- as well as anion-exchanger is pr
eferable for improvement of membrane selectivity. Potentiometric properties
for calcium and magnesium selective membranes containing both ion-exchange
rs are compared to the results obtained by impedance spectroscopic method.