Document Detail


Dispersive liquid-liquid microextraction using an in situ metathesis reaction to form an ionic liquid extraction phase for the preconcentration of aromatic compounds from water.
MedLine Citation:
PMID:  19756541     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
A novel microextraction method is introduced based on dispersive liquid-liquid microextraction (DLLME) in which an in situ metathesis reaction forms a water-immiscible ionic liquid (IL) that preconcentrates aromatic compounds from water followed by separation using high-performance liquid chromatography. The simultaneous extraction and metathesis reaction forming the IL-based extraction phase greatly decreases the extraction time as well as provides higher enrichment factors compared to traditional IL DLLME and direct immersion single-drop microextraction methods. The effects of various experimental parameters including type of extraction solvent, extraction and centrifugation times, volume of the sample solution, extraction IL and exchanging reagent, and addition of organic solvent and salt were investigated and optimized for the extraction of 13 aromatic compounds. The limits of detection for seven polycyclic aromatic hydrocarbons varied from 0.02 to 0.3 microg L(-1). The method reproducibility produced relative standard deviation values ranging from 3.7% to 6.9%. Four real water samples including tap water, well water, creek water, and river water were analyzed and yielded recoveries ranging from 84% to 115%.
Authors:
Cong Yao; Jared L Anderson
Publication Detail:
Type:  Journal Article     Date:  2009-09-11
Journal Detail:
Title:  Analytical and bioanalytical chemistry     Volume:  395     ISSN:  1618-2650     ISO Abbreviation:  Anal Bioanal Chem     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2010-01-29     Completed Date:  2010-04-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101134327     Medline TA:  Anal Bioanal Chem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1491-502     Citation Subset:  -    
Affiliation:
Department of Chemistry, The University of Toledo, 2801 W. Bancroft Street; MS 602, Toledo, OH 4360, USA.
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