A simultaneous determination of 16 phthalates residues in vegetables by GC-MS/MS

An analytical multiresidue method was developed for the simultaneous determination of 16 PAEs in vegetables by GC-EI/MS.Samples were extracted by hexane,cleaned up on a Florisil column,then were determined by GC-EI/MS with BB as the internal standard.The recovery studies were performed at 100 and 200 μg/kg fortification levels for each phthalate,and the recoveries ranged from 70.9% to 123.0% with a relative standard deviations between 1.6% and 15%.The detection limits of the method were less than 2.77 μg/kg for the most of PAEs except for DMEP.The developed method was linear over the range assayed 50~800 μg/kg,with determination coefficients in the range of 0.99623 ~0.99998.Finally,the developed analytical method was applied to the determination of 16 PAEs in five vegetables.