纳米银-聚乙烯复合包装中银对2 种抗氧化剂向食品模拟物迁移的影响

探究纳米银-聚乙烯复合包装中纳米银成分的存在对2 种抗氧化剂（Irganox1076和Irgafos168）向食品模拟物迁移规律的影响。将含有抗氧化剂的聚乙烯包装膜和同时含有抗氧化剂与纳米银的复合包装膜裁成正方形若干，分别浸泡于正己烷和体积分数95%乙醇溶液2 种食品模拟物中，密封后在20、40 ℃以及70 ℃条件下进行迁移实验。食品模拟物中2 种抗氧化剂的加标回收率在79.3%～108.0%之间，相对标准偏差在0.7%～5.3%之间。2 种抗氧化剂的迁移会随着迁移温度的升高以及迁移时间的延长而增加直至达到迁移平衡，且其在正己烷模拟物中的迁移量大于在体积分数95%乙醇模拟物中的迁移量；含纳米银聚乙烯塑料比不含纳米银聚乙烯塑料中的抗氧化剂向食品模拟物中的迁移量小，表明纳米银成分的存在可以抑制包装中的抗氧化剂向食品模拟物中的迁移。

Impact of Nanosilver on Migration of Two Antioxidants from Nanosilver-Plastic Food Packaging to Food Simulants

This study aimed to evaluate the effect of nanosilver on the migration of two antioxidants (Irganox1076 and
Irgafos168) from nanosilver-polyethylene plastic packaging into food simulants. Two polyethylene films containing two
antioxidants (Irganox1076 and Irgafos168) with or without nanosilver were soaked in the food simulants, hexane or 95%
aqueous ethanol (V/V), at 20, 40 or 70 ℃ for migration. The spiked recoveries of two antioxidants from the food simulants
ranged from 79.3% to 108.0% with relative standard deviations (RSDs) varying from 0.7% to 5.3%. In addition, the
migration of two antioxidants increased gradually with the increases in temperature and time in both food simulants till the
migration balance. The migration was greater in hexane than in 95% (V/V) ethanol. The migration of the polyethylene film
with nanosilver was lower than that without nanosilver. Thus, the addition of nanosilver plastic hindered the migration of
antioxidants into food simulants.