IQUIR 05412
INSTITUTO DE QUIMICA ROSARIO
Unidad Ejecutora - UE
artículos
Título:
A novel application of nylon membranes for tributyltin determination in complex environmental samples by fluorescence spectroscopy and multivariate calibration
Autor/es:
BRAVO, M.; ESCANDAR, G. M.; OLIVIERI, A. C.; BARDIN, E.; AGUILAR, L. F.; QUIROZ, W.
Revista:
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 147 p. 77 - 84
ISSN:
0169-7439
Resumen:
The widely distributed pollutant tributyltin (TBT) was analyzed in different environmental samples (waters and sediments) combining preconcentration on a nylon membrane, excitation?emission fluorescence matrices directly measured over the membrane and second-order multivariate calibration. The latter was implemented using unfolded partial least-squares with residual bilinearization (U-PLS/RBL), a flexible algorithm achieving second-order advantage, even under severe spectral overlapping among sample components. Matrix-specific calibrations were required to overcome matrix effects, resulting in good analytical performance. TBT was determinedin the concentration ranges 0.043?1.42 ng Sn mL−1 in water and 24?400 μg Sn kg−1 in sediments, with adequate detection limits in the range 0.03?0.15 ng Sn mL−1.
