Selective Recognition of Calcium Ion through Liquid Membrane

Jong Seung Kim, Moon Hwan Cho, Sang Chul Lee, Kyung Bok Lee, Wonbo Sim, Jae Hyung Yoo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The mole transport rate of alkaline earth metal ions through a bulk liquid membrane and a supported liquid membrane using a series of proton diionizable acyclic polyethers was measured. Among alkaline earth metal ions, the calcium ion was observed to be selectively transported in both single and competitive transport experiments. Potentiometric titration and solution calorimetric titration also gave calcium selectivity over other alkaline earth metal ions. Acyclic polyether bearing a diethylene glycol unit and n-tetradecyl lipophilic chain at the α position of carboxylic acid affords the best selectivity for the calcium ion in bulk and supported liquid membranes.

Original languageEnglish
Pages (from-to)282-289
Number of pages8
JournalMicrochemical Journal
Issue number3
Publication statusPublished - 1998 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy


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