Determination of anionic surface active agents using silica coated magnetite nanoparticles modified with cationic surfactant aggregates

authors	Pena-Pereira, F; Duarte, RMBO; Trindade, T; Duarte, AC
nationality	International
journal	JOURNAL OF CHROMATOGRAPHY A
author keywords	Magnetic nanoparticles; Extraction; Sample preparation; Preconcentration; Anionic surfactants; Linear alkylbenzene sulfonates
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
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.
publisher	ELSEVIER SCIENCE BV
issn	0021-9673
year published	2013
volume	1299
beginning page	25
ending page	32
digital object identifier (doi)	10.1016/j.chroma.2013.05.040
web of science category	Biochemical Research Methods; Chemistry, Analytical
subject category	Biochemistry & Molecular Biology; Chemistry
unique article identifier	WOS:000321424000004