Abstract
A method for rapid analysis of 16 polycyclic aromatic hydrocarbons (PAHs) in edible oils has been developed on the basis of a simplified solvent extraction and liquid chromatography-atmospheric pressure photoionization tandem mass spectrometry performed in multiple reaction monitoring mode. The briefness of the experimental procedure, the use of milliliters of acetonitrile for extraction without any further cleanup process, the short analysis time, and the excellent sensitivity and selectivity demonstrated the advantages of this practical and environmentally friendly method. All the analytes exhibited satisfactory recoveries at three spiking levels (the recoveries ranged from 77.8 to 106.4%), and the relative standard deviations were lower than 10%. The limits of quantitation of this method for the 16 PAHs were in the range of 0.02-0.43 μg/kg. The validated method was successfully applied for the determination of PAHs in coconut oil reference material (BCR-458) and real edible oil samples. The results suggested that a large-scale investigation of the concentration of PAHs in vegetable oils in China is required.
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