食用油中邻苯二甲酸酯和己二酸酯的GC-MS定量分析与迁移特性研究

采用有机溶剂超声萃取法对食用油中的邻苯二甲酸酯和己二酸酯进行提取，并对萃取溶剂和物料比进行优化，利用气相色谱-质谱-选择离子监测技术进行检测，同时研究不同温度条件下食用油中邻苯二甲酸酯和己二酸酯的定量迁移规律。结果表明，在优化实验条件下，21 种邻苯二甲酸酯和己二酸酯的平均回收率和精密度分别为82.74%～111.01%和2.56%～6.01%，方法检出限在0.28～14.25 μg/L之间，塑料桶装食用油中主要含有邻苯二甲基二甲酯、邻苯二甲基二丁酯、邻苯二甲基二（2-乙基己基）酯和己二酸二（2-乙基己基）酯，且在不同温度条件下，迁移量随着时间推移逐渐增加。

Quantitative Analysis by Gas Chromatography-Mass Spectrometry and Migration Characteristics of Phthalates and Adipates in Edible Oils

In this study, phthalates and adipates in plastic-packaged edible oils were analyzed by gas chromatography-mass
spectrometry in the selected ion monitoring mode (GC-MS-SIM) following ultrasonic-assisted organic solvent extraction,
and the migration of phthalates and adipates was studied quantitatively at different temperatures. The results showed that
under the optimized experimental conditions, the recoveries and precision of 21 phthalate acid esters (PAEs) and adipate acid
esters (AEs) were in the ranges of 82.74%–111.01% and 2.56%–6.01%, respectively, and the limits of detection (LOD) were
in the range of 0.28–14.25 μg/L. Commercial corn oil was detected to contain mainly dimethyl phthalate (DMP), dibutyl
phthalate (DBP), bis-(2-ethylhexyl) phthalate (DEHP) and bis-(2-ethylhexyl) adipate (DEHA) due to the migration from the
packaging material, and the amount of migration was increased gradually over time at different temperatures.