title: Evaluation of perchlorate tolerant photo-cured calcium selective electrodes for use in flow injection potentiometry.
abstract: A photo-cured membrane selective to calcium, based on the calcium bis [4-(1',1',3',3'-tetramethylbutyl)phenyl]phosphate ionophore and incorporating the lipophilic additive, potassium tetraki(4-chlorophenyl)borate, that can tolerate up to 200 nM perchlorate ionic background in the flow injection potentiometry mode has been previously reported (T. Dimitrakopoulos, J.R. Farrell and P.J. Ives, Electroanalysis, 8 (1996) 391). Improvements in the electrode slope and sensitivity of the previously described photo-cured calcium membrane-based electrode were achieved when anhydrous calcium chloride salt was dissolved into the pre-cured membrane composition and then photo-cured. Similar to the previously reported photo-cured calcium ion-selective electrode (ISE), the improved photo-cured calcium ISE can measure calcium in a high perchlorate background in the flow injection potentiometric mode.
authors.affiliation: Department of Physical Sciences, University of Tasmania, P.O. Box 1214, Launceston, Tas., 7250, Australia.
authors.forename: L T
authors.initials: LT
authors.lastname: Di Benedetto
authors.forename: T
authors.initials: T
authors.lastname: Dimitrakopoulos
authors.forename: J R
authors.initials: JR
authors.lastname: Farrell
authors.forename: P J
authors.initials: PJ
authors.lastname: Iles