食品接触用硅橡胶中8种金属元素的迁移分析

Analysis of 8 migratory metal elements in food contact silicone rubber

中文关键词:  电感耦合等离子体质谱法  食品接触用  硅橡胶制品  迁移金属元素

英文关键词:inductively coupled plasma mass spectrometry  food contact  silicone rubber product  migratory metal elements

中文摘要:

      目的 研究食品接触用硅橡胶制品中8种金属元素(钡、锂、铜、铁、钴、锰、锌和铝)的迁移量。方法 以3%乙酸(m:V)作为食品模拟物, 利用电感耦合等离子体质谱法测定食品接触用硅橡胶中8种金属元素的迁移量。结果 各金属元素的线性范围在1~100 μg/L, 方法检出限在0.005~0.6 μg/kg之间, 加标回收率在88.4%~108.0%, 重复性测定相对偏差(n=6)在1.2%~3.6%之间。对20批次食品接触用硅橡胶制品中8种金属元素的迁移量进行测试, 发现7种金属元素(钡、锂、铜、铁、锰、锌和铝)均有检出。结论 该方法可以准确测定食品接触用硅橡胶中8种金属元素(钡、锂、铜、铁、钴、锰、锌和铝)的迁移量, 且检测结果显示随着迁移次数的增加迁移量逐渐降低。

英文摘要:

      Objective To investigate the migrations of 8 metal elements (Ba, Li, Cu, Fe, Co, Mn, Zn, and Al) in food contact silicone rubber product. Methods Acetic acid (3%, m:V) was used as food simulate, and inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the 8 migratory metal elements in food contact silicone rubber product. Results Linear relationships of 8 metal elements were ranged from 1 to 100 μg/L. The limits of quantitation (LOQs) of 8 metal elements were ranged from 0.005 to 0.6 μg/kg, the recoveries were ranged from 88.4% to 108.0%, and the relative standard deviations (RSDs) were ranged from 1.2% to 3.6% (n=6). The migrations of 8 metal elements (Ba, Li, Cu, Fe, Co, Mn, Zn, and Al) in 20 batches of food contact silicone rubber products were tested, and the result indicated that 7 metal elements (Ba, Li, Cu, Fe, Mn, Zn, and Al) were detected as positive. Conclusion The method can accurately determine the migrations of 8 metal elements (Ba, Li, Cu, Fe, Co, Mn, Zn, and Al) in food contact silicone rubber product, and the migrations decrease gradually as the increasing of the number of migration.