【摘要】 目的:建立食品包装材料中残留氯乙烯、1,1-二氯乙烷和1,2-二氯乙烷单体含量的自动顶空毛细管气相色谱分析方法。方法:准确称取样品于顶空瓶中,加入N,N二甲基乙酰胺,加盖密封,放入自动顶空进样器,供气相色谱分析,外标法定量。采用DB-624毛细管柱和火焰离子化检测器测定。结果:在本实验条件下,氯乙烯、1,1-二氯乙烷和1,2-二氯乙烷单体线性关系良好(r分别为0.9950、0.9992和0.9977)。平均回收率为84%～102%,相对标准偏差(RSD)为0.29%～1.72%。结论:该法简便、快速、灵敏、准确,适合食品包装材料中残留氯乙烯、1,1-二氯乙烷和1,2-二氯乙烷单体的测定。更多还原

【Abstract】 Objective:To establish an analytical method for determination of vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer in food packaging materials by headspace capillary gas chromatography.Methods: Vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer were collected from a standard solution or samples using a headspace system,then analyzed by GC.External standards methods were used for quantitation.DB-624 capillary column and flame ionization detector(FID) were employed.Results: The linear correlation coefficients of the method for vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer were 0.9950,0.9992 and 0.9977,respectively(n=5).The average recoveries were in the range of 84%~102% with relative standard deviations of 0.29%~1.72%.Conclusion: The method was simple and quick.It was suitable for the determination of residual vinyl chloride,1,1-dichloroethane and 1,2-dichloroethane monomer in food packaging materials.更多还原