Selective Recognition of Calcium Ion through Liquid Membrane

Authors: Kim J.S.¹; Cho M.H.²; Lee S.C.²; Lee K.B.¹; Sim W.¹; Yoo J.H.³

Source: Microchemical Journal, Volume 60, Number 3, November 1998 , pp. 282-289(8)

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Abstract:

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 agr position of carboxylic acid affords the best selectivity for the calcium ion in bulk and supported liquid membranes. Copyright 1998 Academic Press.

Language: English

Document Type: Research article

Affiliations: 1: Department of Chemistry, Konyang University, Nonsan, 320-711, Korea 2: Department of Chemistry, Kangwon National University, Chuncheon, 200-701, Korea 3: Korea Atomic Energy Research Institute, Taejon, 305-600, Korea

Publication date: 1998-11-01