A novel application of nylon membranes for tributyltin determination in complex environmental samples by fluorescence spectroscopy and multivariate calibration

作者：Bravo Manuel A^*; Escandar Graciela M; Olivieri Alejandro C; Bardin Emmanuelle; Aguilar Luis F; Quiroz Waldo

来源：Chemometrics and Intelligent Laboratory Systems, 2015, 148: 77-84.

DOI：10.1016/j.chemolab.2015.09.005

• Tributyltin
• Nylon membrane
• Multivariate calibration
• Fluorescence spectroscopy

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 determined in the concentration ranges 0.043-1.42 ng Sn mL(-1) in water and 24-400 mu g Sn kg(-1) in sediments, with adequate detection limits in the range 0.03-0.15 ng Sn mL(-1).

• 出版日期2015-11-15