Abstract
A method was developed for the determination of 17 phthalic acid esters in fatty food by dispersive solid phase extraction-gas chromatography-mass spectrometry(d-SPE-GC-MS).Tea milk samples were extracted with acetonitrile: methyl tert-butyl ether(9 ∶ 1,V/V),and the extract was cleaned up by MAS-PAEC d-SPE column.Flavor seasonings samples were extracted with acetonitrile(saturated with hexane): methyl tert-butyl ether(19 ∶ 1,V/V),and the extract was cleaned up by CNW d-SPE column.Matrix-match external standard method was used for quantification.The results showed that the average recoveries of 17 phthalic acid esters in milk tea were 82.2%-125.4% and relative standard deviations were less than 16.5%.The limit of detection(LOD) of all the compounds were 100-200 μg/kg.The average recoveries of 17 phthalic acid esters in flavor seasonings were 70.9%-115.5% and relative standard deviations were less than 9.8%.The limits of detection(LOD) of all the compounds were 400-800 μg/kg.The method is quick,sensitive,easy,cheap,rugged,and can be applied to the detection of 17 phthalic acid esters in fatty food.
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