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目的:建立了食用油中邻苯二甲酸酯的GC-MS测定方法。方法:样品用乙腈提取,经SILICA/PSA玻璃混合型固相萃取柱净化后,用GC-MS测定,定性离子丰度比定性,外标法定量。结果:标准曲线的相关系数在0.997～0.999之间,方法的检出限在0.02 mg/kg～0.05 mg/kg之间,加标回收率实验在74.9%～119.5%之间,相对标准偏差在2.32%～6.87%之间。结论:该方法具有操作简单、准确度和精密度好等优点,可适用于食用油中邻苯二甲酸酯类物质的检测。
Objective: To establish a method for the determination of phthalates in edible oils by GC-MS. Methods: The samples were extracted with acetonitrile and purified by SILICA / PSA glass hybrid solid phase extraction cartridge. Qualitative ion abundance was determined by GC-MS. Results: The correlation coefficient of standard curve ranged from 0.997 to 0.999. The detection limit of the method was between 0.02 mg / kg and 0.05 mg / kg. The recoveries of standard addition ranged from 74.9% to 119.5%. The relative standard deviations 2.32% ~ 6.87% between. Conclusion: The method has the advantages of simple operation, good accuracy and precision, which can be applied to the detection of phthalates in cooking oil.