Document Detail


Potential of combining of liquid membranes and molecularly imprinted polymers in extraction of 17beta-estradiol from aqueous samples.
MedLine Citation:
PMID:  19425015     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The potential of combination of liquid membranes (microporous membrane liquid-liquid extraction) and molecularly imprinted polymers (MIPs) was performed using 17beta-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.
Authors:
Olga Nemulenzi; Byron Mhaka; Ewa Cukrowska; Olof Ramström; Hlanganani Tutu; Luke Chimuka
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of separation science     Volume:  32     ISSN:  1615-9314     ISO Abbreviation:  J Sep Sci     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-06-03     Completed Date:  2009-09-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088554     Medline TA:  J Sep Sci     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1941-8     Citation Subset:  IM    
Affiliation:
School of Chemistry, University of the Witwatersrand, WITS, Johannesburg, South Africa.
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MeSH Terms
Descriptor/Qualifier:
Acetates / chemistry
Chromatography, High Pressure Liquid
Estradiol / isolation & purification*
Hexanes / chemistry
Membranes, Artificial*
Molecular Imprinting*
Polymers / chemistry*
Porosity
Water / chemistry*
Water Pollutants, Chemical / isolation & purification*
Chemical
Reg. No./Substance:
0/Acetates; 0/Hexanes; 0/Membranes, Artificial; 0/Polymers; 0/Water Pollutants, Chemical; 141-78-6/ethyl acetate; 50-28-2/Estradiol; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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