Analytical Sciences

Abstract − Analytical Sciences, 20(11), 1599 (2004).

Oligocarbazoles as Ligands for Lead-selective Liquid Membrane Electrodes
Jerzy RADECKI,* Izabela GRZYBOWSKA,** Ahmed HAMEURLAINE,*** and Wim DEHAEN***
*Institute of Animal Reproduction of Polish Academy of Sciences, Division of Food Science, Tuwima 10, 10-747 Olsztyn, Poland
**University of Warmia and Mazury, Faculty of Environmental Sciences and Fisheries, Oczapowskiego 5, 10-719 Olsztyn, Poland
***University of Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Leuven, Belgium
Oligocarbazoles have been applied as new ionophores in liquid membrane electrodes (ISEs) destined for lead(II) determination in water samples. The oligocarbazole-containing ISEs demonstrated a close-to-Nernstian potentiometric response towards Pb2+ in the activity range 10-7 - 10-2 M. The selectivity coefficients measured by the matched potential method (MPM) confirmed their good selectivity against common interfering mono- and doubly charged cations. The oligocarbazole-containing ISEs do not respond towards protons. Their applicability has been checked by performing the recovery test while using a sample of wastewater.