J. Phys. IV France
Volume 107, May 2003
Page(s) 1021 - 1024

J. Phys. IV France
107 (2003) 1021
DOI: 10.1051/jp4:20030472

The use of Permeation Liquid Membrane (PLM) as an analytical tool for trace metal speciation studies in natural waters

N. Parthasarathy, M. Pelletier and J. Buffle

University of Geneva, Department of Analytical Chemistry, Sciences II, 30 quai Ernest-Ansermet, 1211 Geneva 4, Switzerland

Permeation liquid membrane (PLM) based on liquid-liquid extraction principles is an emerging analytical tool for making in situ trace metal speciation measurements. A PLM comprising didecyl 1, 10 diaza crown etherlauric acid in phenylhexane/toluene has been developed for measuring free metal ions (e.g. Cu, Pb, Cd and Zn) concentration under natural water conditions. The capability of PLM for making speciation studies has been demonstrated using synthetic and natural ligands. Application of in situ preconcentration of trace metals in diverse waters using specially designed hollow fibre PLM are reported.

© EDP Sciences 2003