Determination of benzopyrene in vegetable oil by liquid-phase extraction- RP-HPLC
  
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KeyWord:benzopyrene  RP-HPLC  liquid-phase extraction
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PENG Xiaodong, WANG Huan, LI Hongzhou,etc  
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Abstract:
      A method for determination of benzopyrene(BaP) in vegetable oil by liquid-phase extraction-reversed phase high performance liquid chromatography (RP-HPLC)was established. With n-hexane saturated by acetonitrile-acetonitrile saturated by n-hexane as extraction solvent, the content of BaP in vegetable oil was determined by RP-HPLC.The results showed that there was linear relationship between peak area and BaP mass concentration in the range of 2-100 ng/mL, the linear equation was Y=0717 823X+0.159 747,and the correlation coefficient was 0.999 99.When the volume ratio of n-hexane saturated by acetonitrile to acetonitrile saturated by n-hexane was 2∶?5 (4 mL n-hexane saturated by acetonitrile, 10 mL acetonitrile saturated by n-hexane), the recovery rate was 82.62%, the precision was 1.1%, and the limit of detection was 0.4 μg/kg. The method was stable,efficient and low cost,and was suitable for the determination of BaP in vegetable oil.
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