Determination of three parabens by microwave-assisted ionic liquid dispersive liquid-liquid microextraction in water solubility cosmetic samples
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    Abstract:

    Microwave-assisted ionic liquid dispersive liquid-liquid microextraction was developed for the determination of three P–hydroxybenzoic easters (parabens). High-performance liquid chromatography coupled with UV detector was used for the determination of parabens. Several important parameters influencing the extraction efficiency such as volume of extraction solvent , disperser solvent, microwave time, centrifugation time and salt effect, were investigated. Under the optimized conditions, the enrichment factors(68.3~124.5).and accepted recoveries (55.5~99.2%) were obtained for the extraction of the target analytes .The calibration curve was linear with correlation coefficient ranged from 0.9989 to 0.9991 in the concentration level of 0.1~50 mg/L and the relative standard deviations(RSD, n = 3) were 4.9~5.1%. The limits of detection for three parabens were 0.6~1.2μg/L This method minimized the use of organic solvents and was successfully applied to the extraction of parabens from water solubility cosmetic samples and real water samples.

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History
  • Received:December 09,2010
  • Revised:January 13,2011
  • Adopted:February 22,2011
  • Online: May 09,2011
  • Published:
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