目的 采用气相色谱-质谱法测定食品包装材料中柠檬酸三乙酯、柠檬酸三丁酯、乙酰柠檬酸三丁酯、柠檬酸三辛酯的增塑剂。 方法 采用正己烷超声萃取处理待测样品,全扫描定性目标物,选择离子扫描定量。 结果 4 种增塑剂的线性相关系数 r >0 . 997 ,回收率为 92 . 7% ~ 102 . 3% ,相对标准偏差为 3 . 2% ~ 7 . 3% 。 结论 该方法操作简单,结果准确,灵敏度高,稳定性好,适用于食品包装材料中 4 种柠檬酸酯增塑剂的同时测定。

Objective To develop a GC-MS method for the simultaneous determination of TEC, TBC, ATBC, and TOC in food packaging materials. Methods N-hexane ultrasonic extraction was used to process samples, the targets were qualitatively characterized by full scan, and ion scanning was selected for quantification. Results All the correlation coefficients ( r) of the 4 kinds of plasticizer were above 0. 997, the recoveries were 92. 7% ~ 102. 3% , and the relative standard deviations ( RSD) of the method were 3. 2% ~ 7. 3% . Conclusion The method is rapid, sensitive, highly precise and reproducible, and is suitable for monitoring the four citrate plasticizers in food packages.