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| Determination of PAEs in vegetable oil by GC-MS/MS with isotope dilution |
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| KeyWord:isotope dilution phthalate esters gas chromatography-tandem mass spectrometry vegetable oil |
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| Abstract: |
| Sixteen phthalate esters(PAEs) were simultaneously determined in vegetable oil using gas chromatography-tandem mass spectrometry (GC-MS/MS) with isotope dilution. The samples were extracted with acetonitrile saturated by n-hexane and cleaned up with solid phase extraction column，then determined by GC-MS/MS using internal standard method for quantitative analysis. The results showed that the method had a good linear relationship with correlation coefficient above 0.99，and the detection limit and quantitation limit were 3.0 μg/kg and 10.0 μg/kg，respectively；adding PAEs mixed standard solution with three levels 10，50，100 μg/kg to vegetable oil，the mean recoveries of sixteen PAEs in vegetable oil were 82.3%-104.5%，and the relative standard deviations were 1.3%-10.8%. The method had high sensitivity，little interference and good precision，which was suitable for the determination of PAEs in vegetable oil. |
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