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Liquid phase micro-extraction of linear alkylbenzene sulfonate anionic surfactants in aqueous samples

Opened Access Liquid phase micro-extraction of linear alkylbenzene sulfonate anionic surfactants in aqueous samples

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Autor: Larsson, Niklas
Otrembska, Paulina
Villar Navarro, Mercedes
Jönsson, Jan Åke
Departamento: Universidad de Sevilla. Departamento de Química Analítica
Fecha: 2011
Publicado en: Membranes, 1 (4), 299-313.
Tipo de documento: Artículo
Resumen: Hollow fiber liquid phase micro-extraction (LPME) of linear alkylbenzene sulfonates (LAS) from aqueous samples was studied. Ion pair extraction of C10, C11, C12 and C13 homologues was facilitated with trihexylamine as ion-pairing agent, using di-n-hexylether as solvent for the supported liquid membrane (SLM). Effects of extraction time, acceptor buffer concentration, stirring speed, sample volume, NaCl and humic acids were studied. At 10–50 µg L−1 linear R2-coefficients were 0.99 for C10 and C11 and 0.96 for C12. RSD was typically ~15%. Three observations were especially made. Firstly, LPME for these analytes was unusually slow with maximum enrichment observed after 15–24 h (depending on sample volume). Secondly, the enrichment depended on LAS sample concentration with 35–150 times enrichment below ~150 µg L−1 and 1850–4400 times enrichment at 1 mg L−1. Thirdly, lower homologues were enriched more than higher homologues at low sample concentrations, with reversed conditions at higher ...
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Cita: Larsson, N., Otrembska, P., Villar Navarro, M. y Jönsson, J.Å. (2011). Liquid phase micro-extraction of linear alkylbenzene sulfonate anionic surfactants in aqueous samples. Membranes, 1 (4), 299-313.
Tamaño: 337.4Kb
Formato: PDF

URI: http://hdl.handle.net/11441/47222

DOI: 10.3390/membranes1040299

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