采用气相色谱-质谱联用(GC-MS)方法并结合液液萃取及基质分散固相萃取的样品处理方式,建立了测定饮料、牛奶、白酒3类食品中16种邻苯二甲酸酯类增塑剂的分析方法.研究结果表明16种邻苯二甲酸酯类增塑剂的检出限(LOD,S/N=3)范围为0.005 ~0.025mg/L;峰面积的相对标准偏差(RSD)均小于2%.饮料、牛奶、白酒3种样品的加标回收率范围普遍在60% ~110%.所建方法简便、灵敏、准确,可满足饮料、牛奶和白酒中痕量邻苯二甲酸酯类增塑剂的测定需要.此外,将该方法应用于食品包装材料中邻苯二甲酸酯类增塑剂的迁移研究,以异辛烷为油脂食品模拟物,测定了保鲜膜与保鲜袋中16种邻苯二甲酸酯类增塑剂的迁移量.结果显示保鲜膜存在显著的邻苯二甲酸酯类增塑剂迁移现象.
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