气相色谱-质谱法测定食品接触材料中1,3-二氧五环和三聚甲醛的迁移量

Determination of migration of 1,3-dioxane and 1,3,5-trioxane in food contact materials by gas chromatography-mass spectrometry

中文关键词:  食品接触材料  顶空-气相色谱-质谱法  迁移量  1,3-二氧五环  三聚甲醛

英文关键词:food contact material  gas chromatography-mass spectrometry  migration  1,3-dioxane  1,3,5-trioxane

中文摘要:

      目的 建立顶空进样-气相色谱-质谱联用法测定食品接触用聚甲醛中1,3-二氧五环和三聚甲醛在不同的食品模拟物(水基、酸性、醇类、油性等)中迁移量的分析方法。方法 模拟液中的1,3-二氧五环和三聚甲醛通过顶空进样的方式(顶空进样条件为85 ℃平衡30 min)经键合了苯乙烯-二乙烯基苯聚合物的色谱柱分离, 最终由质谱来进行检测及分析。结果 在优化顶空平衡时间、平衡温度、色谱柱、气相色谱以及质谱条件后, 本方法精密度为1.1%~7.3%, 最低检出限可达到0.02 mg/kg, 回收率为87.0%~104.3%。结论 本方法准确、高效、简便, 可用于检测水、酸性、醇类、油基四类模拟物中1,3-二氧五环和三聚甲醛的迁移量。

英文摘要:

      Objective To establish a method for determination of 1,3-dioxane and 1,3,5-trioxane migration in different food simulants (water-based, acidity, alcohols, oils, etc.) in food-contact polyoxymethylene by headspace sampling-gas chromatography-mass spectrometry. Methods 1,3-dioxane and 1,3,5-trioxane in simulated liquid separation were separated by the column of styrene divinylbenzene polymer through headspace injection (the headspace injection condition was 85 ℃ equilibrium for 30 min), and detected and analyzed by the mass spectrometry. Results After optimizing headspace equilibration time, equilibrium temperature, column, gas chromatography and mass spectrometry conditions, the precisions of this method were 1.1%7.3%, the lower limit of detection was 0.02 mg/kg, and the recoveries were 87.0%104.3%. Conclusion The method is accurate, efficient and simple, and can be used to detect the migration of 1,3-dioxane and 1,3,5-trioxane in different simulants.