Potentiometric determination of K+ ions using a K+-selective electrode with macrocyclic liquid membrane

  • Cezar Spinu Faculty of Chemistry, University of Craiova, A.I. Cuza 13, Craiova, Romania
  • Marian Isvoranu Faculty of Chemistry, University of Craiova, A.I. Cuza 13, Craiova, Romania
  • Maria Pleniceanu Faculty of Chemistry, University of Craiova, A.I. Cuza 13, Craiova, Romania
  • Cristian Tigae Faculty of Chemistry, University of Craiova, A.I. Cuza 13, Craiova, Romania
Keywords: K -selective electrode, Macrocyclic ligand, Potentiometry

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.

 

 

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eISSN: 1726-801X
print ISSN: 1011-3924