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Potentiometric determination of K<sup>+</sup> ions using a K<sup>+</sup>-selective electrode with macrocyclic liquid membrane
Abstract
This paper describes analytical applications of K+-selective liquid membrane electrode. The membrane is the solution of the active complex formed by the K+ ions with dibenzo-18-crown-6 ionophore (DB-[18]-C-6) extracted in propylenecarbonate (PC). Successful application of the developed electrode for K+ ions determination in aqueous solution and samples of commercial mineral water by direct potentiometry is presented.
KEY WORDS: K+-selective electrode, Macrocyclic ligand, Potentiometry
Bull. Chem. Soc. Ethiop. 2008, 22(2), 295-299.