Polymeric membrane electrodes for monohydrogen phosphate and sulfate

Monia Fibbioli, Michael Berger, Franz P. Schmidtchen, Emö Pretsch

Research output: Contribution to journalArticlepeer-review

120 Scopus citations

Abstract

A zwitterionic bis(guanidinium) ionophore bearing an anionic closo- borane cluster (1) and a dihydrochloride analogue (2) are investigated in polymeric membrane ion-selective electrodes (ISEs). Both compounds have been previously shown to complex and selectively extract oxoanions. By systematic variation of the kind and concentration of the ion-exchanger sites in the membrane, the optimal performance with the so far best sulfate selectivity is found for ISE membranes based on the dihydrochloride, whereas those with the zwitterion analogue are shown to possess a reasonably good selectivity for monohydrogen phosphate.

Original languageEnglish
Pages (from-to)156-160
Number of pages5
JournalAnalytical Chemistry
Volume72
Issue number1
DOIs
StatePublished - 1 Jan 2000

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