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Amperometric detection of the ammonium ion by facilitated ion transfer across the interface between two immiscible electrolyte solutions
Author(s) -
Osborne Murray D.,
Girault Hubert H.
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070505
Subject(s) - valinomycin , chemistry , electrolyte , ion , ammonium , inorganic chemistry , potassium , sodium , ionophore , selectivity , membrane , electrode , organic chemistry , catalysis , biochemistry
Facilitated ion transfer reactions of the ammonium, potassium, and sodium ions with the ionophores dibenzo‐18‐crown‐6, nonactin, and valinomycin were investigated at the water/ 1, 2‐dichloroethane interface. Association constants for the various reactions studied were calculated to determine the selectivity imparted by the ionophores on the transferring ions. Of the ionophores studied, nonactin was found to be the most selective towards the ammonium ion, with a calculated association constant of 14.1.