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Potential of combining of liquid membranes and molecularly imprinted polymers in extraction of 17 beta-estradiol from aqueous samples
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
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2009 (English)In: Journal of Separation Science, ISSN 1615-9306, E-ISSN 1615-9314, Vol. 32, no 11, 1941-1948 p.Article in journal (Refereed) Published
Abstract [en]

The potential of combination of liquid membranes (microporous membrane liquid-liquid extraction) and molecularly imprinted polymers (MIPs) was performed using 17 beta-estradiol (E2) as model compound. The model compound was extracted from aqueous sample through a hydrophobic porous membrane that was impregnated with hexane/ethyl acetate (3:2), which also formed part of the acceptor phase. In the acceptor phase, the compound was bound onto MIP particles that were also part of the organic phase. The potential of such combination was optimised for the type and amount of MIP particles in the organic acceptor phase, the extraction time, and the type of organic acceptor solvent. Ultrasound assisted binding of E2 onto MIP particles was also investigated. MIPs prepared by precipitation polymerization were found to be superior to those prepared by bulk polymerization. Increase in the extraction time and the amount of MIP particles in the acceptor phase led to more E2 binding onto the MIP particles. Hexane/ethyl acetate (3:2) as an organic acceptor was found to give higher E2 binding onto MIP particles compared to toluene, diethyl ether, and hexane. Ultrasound was furthermore found to increase the binding of E2 onto MIP particles. The selectivity of the technique was demonstrated by extracting wastewater and where clean chromatograms were obtained compared to liquid membrane extractions (SLMs) alone.

Place, publisher, year, edition, pages
2009. Vol. 32, no 11, 1941-1948 p.
URN: urn:nbn:se:kth:diva-18510DOI: 10.1002/jssc.200800659ISI: 000266929700019ScopusID: 2-s2.0-67649973293OAI: diva2:336557
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-02-02Bibliographically approved

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Ramström, Olof
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