IQUIR   05412
INSTITUTO DE QUIMICA ROSARIO
Unidad Ejecutora - UE
artículos
Título:
DETERMINATION OF TRIBUTYLTIN AT PARTS-PER-TRILLION LEVELS IN NATURAL WATERS BY SECOND-ORDER MULTIVARIATE CALIBRATION AND FLUORESCENCE SPECTROSCOPY
Autor/es:
BRAVO, M.; AGUILAR, L. F.; QUIROZ, W.; OLIVIERI, A.C.; ESCANDAR, G.M.
Revista:
MICROCHEMICAL JOURNAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 106 p. 95 - 101
ISSN:
0026-265X
Resumen:
This work presents a non-sophisticated approach for the trace
determination of tributyltin, the most toxic organotin species, in very
interfering environments, combining fluorescence measurements of its morin
complex and the selectivity of second-order chemometric algorithms. The power of
MCRALS (multivariate curve resolution/alternating
least-squares) to quantify tributyltin
through fluorescence excitation-emission matrices in the presence of its main
degradation products and of a pool of additional twenty-three metal ions is
demonstrated. The applied algorithm successfully faces the challenge of solving
the strong overlapping among the spectra of the several
sample components. The proposed methodology was applied to tap, river, lagoon
and seawater spiked samples, obtaining satisfactory results at ng L1
levels, after a pre-concentration step on a C18 membrane, demonstrating the
analytical potential of the proposed methodology