Poly(vinyl chloride) membrane cesium ion-selective electrodes based on lipophilic calix[6]arene tetraester derivatives |
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| Authors: | Oh H Choi E M Jeong H Nam K C Jeon S |
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| Institution: | Department of Chemistry and Institute of Basic Science, Chonnam National University, Kwangju 500-757, South Korea. |
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| Abstract: | New lipophilic tetraesters of calix6]arene and calix6]diquinone are investigated as cesium ion-selective ionophores in poly(vinyl chloride) membrane electrodes. For an ion-selective electrode based on calix6]arene tetraester I, the linear response is 1x10(-6)-1x10(-1) M of Cs(+) concentrations. The selectivity coefficients for cesium ion over alkali, alkaline earth and ammonium ions are determined. The detection limit (log a (Cs (+))=-6.31) and the selectivity coefficient (log k (Cs (+),Rb (+))(pot )=-1.88) are obtained for polymeric membrane electrode containing calix6]arene tetraester I. |
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