Determination of 16 PAHs in edible oil by SPE and GC-MS /MS

A method was developed for rapid determination of 16 Polycyclic Aromatic Hydrocarbons ( PAHs) in edible oil based on an improved Alumina solid phase extraction pre-treatment method combined with the gas-a triple quadrupole mass spectrometry ( GC-MS/MS) .Edible oil was extracted with n-hexane, the supernatant was purified by activated alumina column, the purifying liquid was concentrated then determined by GC-MS/MS with external standard method.The results showed that the ranges of spiked recoveries of 16 PAHs at 1μg /L and 50μg /L were 77.3% ⁸9.7% and 84.2% ⁹7.2%, respectively.The relative standard deviations were below 10%.The detection limits of 16 PAHs were 0.17³.01μg /kg; the correlation coefficients were larger than 0.991.This method was simple, rapid high accuracy, and characterized with acceptable sensitivity and accuracy to meet the requirements for the analysis of multiple PAHs in vegetable oil.