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| Determination of five phthalate acid esters in edible oil by GC-MS and coupled enrichment of liquid-liquid extraction and solid phase extraction |
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| KeyWord:plasticizer phthalate acid esters edible oil solid-phase extraction GC-MS |
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| Abstract: |
| A method for determination of five common phthalate acid esters（PAEs） in edible oil was established. The edible oil samples were extracted by acetonitrile and then frozen to defat，and cleaned up with glass ProElut PSA solid phase extraction column. The qualitification and quantification of the five PAEs were performed by GC-MS in full ion scanning and selected ion monitoring （SIM） mode respectively. The results showed that the average recovery rates of standard addition of the five PAEs in edible oil ranged from 76.17% to 98.81% with 1.01%-7.20% of the relative standard deviations. The instrumental detection limits （S/N=3）of the method ranged from 0.3 μg/L to 2.0 μg/L，and the limits of quantitation were 1.0-20.2 μg/kg. This method for the determination of the five PAEs in edible oil had high accuracy and sensitivity. |
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