The electrodes' response demonstrated the ability of the ligands to act as neutral carriers independent of the presence of lipophilic salts in the membrane phase and Cl− or in the test solution.
Better results than those previously reported with other ligands in terms of detection limit (3×10−7 M) and Cs/Na selectivity (Kpot of 1.1×10−5 and 7.4×10−6 for BC6 and BC6N, respectively) were found for the doubly crowned 1,3-calixarenes.
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