食品接触材料中纳米银迁移行为研究

Migration of Ag nanoparticles in food contact material

中文关键词:  迁移  纳米食品接触材料  纳米银  食品模拟液

英文关键词:migration  food contact nanomaterial  Ag nanoparticles  food simulants solution

中文摘要:

      目的 研究纳米银在不同食品模拟液中的迁移情况。方法 采用电感耦合等离子体原子发射光谱法(ICP-AES)检测了纳米银保鲜盒中纳米银的含量, 比较了微波消解和干法灰化的前处理效果, 并研究了不同温度情况下, 纳米银食品接触材料在脂肪类(正己烷)、酸性(4%乙酸)、酒精类(65%乙醇)和水性(去离子水)食品模拟液中的迁移行为。结果 食品模拟溶液、温度对纳米银的迁移有影响, 其中纳米银在脂肪类模拟液中的迁移速度最快, 在65%乙醇中迁移速度最慢。由Fick扩散模型, 建立了PVC中塑化剂的迁移规律数学模型, 得到了模型的重要参数。结论 本研究成果能够对食品接触材料中纳米银的安全性评价提供技术支持。

英文摘要:

      Objective To study the migration rule of Ag nanoparticles (NPs) in different food simulants. Methods The concentrations of Ag NPs in food container were detected by inductively coupled plasma atomic emis-sion spectrometry (ICP-AES), and the effects of pretreatment by microwave digestion and dry ashing were compared. The migration of Ag NPs in 4 kinds of food simulants solution was investigated at different temperatures, which was shown as follows in ascending order: n-hexane, 4% acetic acid, 65% ethanol and distilled water. Results The food simulants and temperature were proved to have effects on the migration of Ag NPs. The migration rate of Ag NPs in fats simulants was the fastest, and in 65% ethanol was the slowest. The mathematical model based on Ficks’ law was established and the model’s important parameters were also achieved. Conclusion The results of this study can provide technical support for the safety evaluation of Ag NPs in food contact materials.