Search results for "ion-pairing"

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Liquid Phase Micro-Extraction of Linear Alkylbenzene Sulfonate Anionic Surfactants in Aqueous Samples

2011

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 sa…

linear alkylbenzene sulfonateLinear alkylbenzenesurfactantFiltration and Separationlcsh:Chemical technologyArticleion-pairingchemistry.chemical_compoundPulmonary surfactantMass transferChemical Engineering (miscellaneous)lcsh:TP1-1185lcsh:Chemical engineeringchemistry.chemical_classificationAqueous solutionChromatographyChemistryProcess Chemistry and TechnologyExtraction (chemistry)lcsh:TP155-156SolventMembranelinear alkylbenzene sulfonate; extraction; liquid-phase microextraction; ion-pairing; method development; environmental analysis; surfactantenvironmental analysisextractionliquid-phase microextractionmethod developmentCounterionMembranes

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