title: Nickel hexacyanoferrate membrane as a coated wire cation-selective electrode.
abstract: Nickel hexacyanoferrates containing alkali metal cations as counter ions were used to prepare ion-selective electrodes for potentiometric sensing of intercalated species in the coated wire electrode (CWE) configuration. All the electrodes developed display a quasi-Nernstian response towards potassium ion, whereas the highest sensitivity is generally achieved when Cs+ is the counter cation in the sensing material. The selectivity constants of the electrodes were calculated by the matched potential method considering K+ as the primary ion. The selectivity order is Cs+ > K+ > Na+ > Li+ and reflects the effective dimension of the hydrated cations.
authors.affiliation: Department of Physical and Inorganic Chemistry, University of Bologna, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Giorgetti
authors.forename: E
authors.initials: E
authors.lastname: Scavetta
authors.forename: M
authors.initials: M
authors.lastname: Berrettoni
authors.forename: D
authors.initials: D
authors.lastname: Tonelli