RT journal article
T1 Coupled Transport of Pb(II) Ions Through a Bulk Liquid Membrane as a Preconcentration Method for Saline Natural Waters
A1 Casanueva Marenco, María José
A1 Galindo Riaño, María Dolores
A1 Granado Castro, María Dolores
A2 Química Analítica
K1 bulk liquid membrane
K1 preconcentration
K1 lead
K1 seawater
K1 atomic absorption spectroscopy
K1 toluene
AB The vital importance of trace metal analysis in environmental water samples is widely recognised. In many cases, due to the low levels of trace metals in water samples and the high complexity of the matrixes (i.e. seawater), direct determination of trace metals is not always possible. A straightforward method for the preconcentration of trace Pb(II) ions in natural waters with salinity levels of >10 g/L has been developed by a liquid membrane containing 2-HBET in toluene. A lower detection limit  of the method in comparison with other liquid membranes for this metal, the use of a cheap commercial organic ligand, as well as the possibility to measure by a common, simple and low cost technique, such as the atomic absorption spectroscopy, show the good results obtained. The efficiency of the process at optimal conditions was 83.7 +- 2.5% after 7 hours, with a precision of 3.1% at a confidence level of 95%, and the preconcentration factor was 20.45. The detection limit of the method was 0.391 microg/L of Pb(II). The liquid membrane system was successfully applied to the determination of lead in spiked saline samples and real seawater collected from the Algeciras bay (Cádiz, south Spain).
SN 1875-6727
YR 2018
FD 2018
LK http://hdl.handle.net/10498/33259
UL http://hdl.handle.net/10498/33259
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026