abstract
The development of a novel methodology for extraction and preconcentration of the most commonly used anionic surface active agents (SAAs), linear alkylbenzene sulfonates (LAS), is presented herein. The present method, based on the use of silica-magnetite nanoparticles modified with cationic surfactant aggregates, was developed for determination of C-10-C-13 LAS homologues. The proposed methodology allowed quantitative recoveries of C-10-C-13 LAS homologues by using a reduced amount of magnetic nanoparticles. Limits of detection were in the range 0.8-1.9 mu g L-1 for C-10-C-13 LAS homologues, while the repeatability, expressed as relative standard deviation (RSD), ranged from 2.0 to 3.9% (N = 6). Finally, the proposed method was successfully applied to the analysis of a variety of natural water samples. (C) 2013 Elsevier B.V. All rights reserved.
keywords
LINEAR ALKYLBENZENE SULFONATES; SOLID-PHASE EXTRACTION; ENVIRONMENTAL WATER SAMPLES; PERFORMANCE LIQUID-CHROMATOGRAPHY; ELECTROPHORESIS-MASS SPECTROMETRY; SODIUM DODECYL-SULFATE; WASTE-WATER; CAPILLARY-ELECTROPHORESIS; TRACE DETERMINATION; BIOLOGICAL SAMPLES
subject category
Biochemistry & Molecular Biology; Chemistry
authors
Pena-Pereira, F; Duarte, RMBO; Trindade, T; Duarte, AC
our authors
Regina Duarte
Post-doc Fellowship
Tito Trindade
Full professorProjects
acknowledgements
Portuguese Foundation for Science and Technology (FCT) is acknowledged for financial support through a Post-Doctoral grant to F. Pena-Pereira (ref. SFRH/BPD/71059/2010), as well as through the European Social Fund (ESF) and