Abstract
The effect of the nature of an ion exchanger and a plasticizer on the selectivity of ion-selective electrodes for cations of primary-tertiary amines and quaternary ammonium bases was studied. The increments of methylene and ionic groups in the logarithms of selectivity coefficients were calculated. It was demonstrated that the effect of the membrane composition on the selectivity coefficient was governed by changes in the increments of corresponding groups. The maximum change in selectivity, which may attain three orders of magnitude, was observed for pairs of primary-quaternary alkylammonium cations. It was shown that the effect of the nature of the cation exchanger on selectivity coefficients was comparable with that of the plasticizer nature.
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Original Russian Text © V.V. Egorov, A.A. Bolotin, 2006, published in Zhurnal Analiticheskoi Khimii, 2006, Vol. 61, No. 3, pp. 299–304.
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Egorov, V.V., Bolotin, A.A. Effect of membrane composition on the selectivity of electrodes selective for alkylammonium ions with different degrees of substitution. J Anal Chem 61, 279–283 (2006). https://doi.org/10.1134/S1061934806030154
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DOI: https://doi.org/10.1134/S1061934806030154