气相色谱-质谱法测定食品接触材料中4种润滑剂的迁移量

Determination of 4 kinds of migration of lubricant in food contact materials by gas chromatography-mass spectrometry

目的建立气相色谱-质谱法测定食品接触材料中常用润滑剂在食物中迁移量的方法。方法采用纯水、3%乙酸水溶液、10%乙醇水溶液3种食物模拟物浸泡食品接触材料,经净化、浓缩,加入三氟乙酸酐衍生,DB-5ms毛细管色谱柱分离（30 m×0.25 mm,0.25μm）,用气相色谱-质谱法测定4种润滑剂含量。结果油酸酰胺、硬脂酰胺在0.2~20 mg/L,芥酸酰胺、山嵛酰胺在1.0~30 mg/L范围内线性良好,方法定量限为0.028~0.17 mg/L,加标回收率为89.2%~97.6%,RSD为1.1%~5.4%。结论本法简便、快速、准确,灵敏度及精密度较高,适用于食品接触材料中润滑剂在相应食品中迁移量的测定。

Objective To establish a gas chromatography-mass spectrometry method to determine the migration of lubricants from food contact materials. Methods Food-simulating solvents of water,10% ethanol,3% acetic acid were used for soaking food contact materials. After purification,enrichment,and trifluoroacetic acid anhydride derivatization,4lubracant migrants were determined by gas chromatography-mass spectrometry（ GC-MS）. Results The linearity range for oleic acid amide and stearic amide was 0. 2-10 mg / L,and it was 1. 0-20 mg / L for erucic acid amide and mountain do amide. The limit of quantification was 0. 028-0. 17 mg / L,and the recoveries were 89. 2%-97. 6%,with relative standard deviation（ RSD） of 1. 1%-5. 4%. Conclusion The method was simple,rapid,accurate,and suitable for the detection of lubricant migration in food contact materials.