Z. Sheng
2011
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Journal
Chemical Journal of Chinese Universities-chinese
Abstract
This paper reports the use of methyl chloroacetate(MCA) as an extraction solvent for coupling liquid-liquid semimicroextraction(LLsME) with micellar electrokinetic chromatography(MEKC) through on-capillary decomposition for the separation of neutral compounds with concentration enhancement.Alkylphenones butyrophenone,valerophenone and acetophenone were chosen as modeling compounds.Aqueous samples of the alkylphenones were extracted by LLsME into MCA.The organic phase was directly subjected to separate by MEKC.The detection limits(S/N≥3) were 50,50 and 100 μg/L for butyrophenone,valerophenone and acetophenone in water,respectively,and the concentration factors of the extraction were in a range of 63 to 151-fold in terms of peak area.The method developed has no requirement for any special experimental apparatus other than a basic CE setup and is time-saving and easy-ope-rated.Recoveries of 4-t-BP and BPA in drink water were examined.The recoveries were obtained as 99.87% and 102.8%,respectively.Therefore,it would be readily acceptable for routine analysis,especially for environmental samples.