气相色谱-质谱法测定食品接触塑料制品中的12种甲基丙烯酸酯类单体在水系模拟物中的迁移量

GC-MS Determination of 12 Methacrylates Migrated from Plastics in Contact with Foods to Aqueous Simulants

摘要: 提出了测定食品接触塑料制品中的12种甲基丙烯酸酯类单体在水系模拟物中迁移量的气相色谱-质谱法。样品在100 ℃水系模拟物中恒温浸泡2 h后,浸泡液经乙酸甲酯振荡萃取10 min,提取液在DB-5MS毛细管色谱柱上分离,质谱分析中选择电子轰击离子源和选择离子监测模式。12种甲基丙烯酸酯类单体在0.600~10.0 mg·L-1范围内呈线性关系,检出限(10S/N)在0.006~0.04 mg·L-1之间。加标回收率在86.6%~115%之间,测定值的相对标准偏差(n=6)在1.2%~9.1%之间。

Abstract: A GC-MS method was developed to determine 12 methacrylates migrated from plastics in contact with foods to aqueous simulants. The sample was soaked in aqueous simulants with constant temperature of 100 ℃ for 2 h, then the soaking solution was extracted with methyl acetate for 10 min by shaking. The extract was separated on a DB-5MS chromatographic column. EI and SIM were adopted in MS analysis. The linear ranges of the 12 methacrylates were 0.600-10.0 mg·L-1, with detection limits (10S/N) in the range of 0.006-0.04 mg·L-1. Recovery rates obtained by standard addition method were in the range of 86.6%-115%, and RSDs (n=6) were in the range of 1.2%-9.1%.