Polycyclic aromatic hydrocarbonsin edible oils: analysis by molecularly imprinted solid-phase extrac

A new method was developed to determine the presence of polycyclic aromatic hydrocarbons (PAHs) in edible fats and oils. Samples are dissolved in petroleum ether, and PAHs are adsorbed onto a molecularly imprinted solid-phase extraction (MIPSPE) cartridge and eluted with ethyl acetate. After evaporation of the solvent, PAHs were re-dissolved in acetonitrile and analyzed by RP-HPLC with fluorescence detection. The detection limits of PAHs were 0.04–0.66 μg/kg and the recovery rates ranged from 56.0 percent to 109.1 percent. The total contents of PAHs in edible oils were 18.00–639.96 μg/kg. The developed method was effective due to its high specificity for PAHs.（一种新方法被开发用于测定食用脂肪和油中的多环芳烃(PAHs)含量。样品溶解在石油醚中,多环芳烃吸附在分子印迹固相萃取上,用乙酸乙酯洗脱。溶剂挥发后,多环芳烃在乙腈中重新溶解,并用带氟检测器的RP-HPLC分析。多环芳烃(PAHs)的检测限是0.04–0.66 μg/kg,回收率从56%到109.1%。多环芳烃在食用油的总含量是18.00–639.96 μg/kg。）