气相色谱-质谱法测定食品接触材料润滑剂在脂类食品模拟物中迁移量

目的建立气相色谱-质谱法测定食品接触材料中润滑剂(油酸酰胺、硬脂酰胺、芥酸酰胺、山嵛酰胺)在脂类食品模拟物中迁移量的方法。方法采用异辛烷、95%乙醇、改性聚苯醚3种试验介质替代脂类食品试验,用三氟乙酸酐衍生后,采用气相色谱-质谱法测定。结果油酸酰胺、硬脂酰胺在0.2~20 mg/L范围内线性良好,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0.026~0.14 mg/L,加标回收率为76.2%~97.3%,相对标准偏差(RSD)为1.2%~6.3%。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脂类食品模拟物中迁移量的测定。

Determination of lubricant migration from food contact materials to the lipid food simulant by chromatography-mass spectrometry

To establish a gas chromatography-mass spectrometry determination method for lubricant migration from food contact materials.Methods Using iooctane, 95% ethanol and MPPO as three kinds of lipids alternatives for food contact materials, the gas chromatography-mass spectrometry detection was conducted after trifluoroacetic anhydride derivation. Results The oleic acid amide and stearic acid amidea had good linear relationship within 0.2-20 mg/L, erucic acid amide and behenamide had good linear relationship within 1.0-30 mg/L. The limits of detection ranged from 0.026 to 0.14 mg/L. The recoveries were in the range of 76.2%-97.3% with the relative standard deviation of 1.2%-6.3%.Conclusion The method was simple, rapid and accurate, and suitable for the detection of lubricants migration from food contact materials in lipid food stimulants.