电感耦合等离子体质谱法分析铜材质食品接触用品中8种金属元素迁移量

Migration analysis of 8 metal elements in copper-based food contact products by inductively coupled plasma mass spectrometry

中文关键词:  铜  食品接触用品  电感耦合等离子体质谱  元素迁移

英文关键词:copper  food contact products  inductively coupled plasma mass spectrometry  migratory elements

中文摘要:

      目的 建立电感耦合等离子体质谱法分析铜材质食品接触用品中8种金属元素(铜、砷、镉、铅、铋、镍、锡、锑)迁移量的方法。方法 以5 g/L柠檬酸(m:V)作为食品模拟物, 利用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)测定铜材质食品接触用品中8种金属元素的迁移量。结果 8种元金属素的线性范围在1~100 μg/L, 方法检出限在0.01~0.9 μg/kg之间, 加标回收率在90.3%~106.0%, 重复性测定相对标准偏差(n=7)在1.3%~3.4%之间。对10批次铜材质食品接触用品中8种金属元素的迁移量进行测试, 发现5种元素(铜、砷、铅、镍和锡)有检出。结论 该方法可以准确测定铜材质食品接触制品中8种金属元素(铜、砷、镉、铅、铋、镍、锡、锑)的迁移量, 检测结果显示随着迁移次数的增加, 大部分元素呈下降趋势。

英文摘要:

      Objective To establish a method ofanalysis of 8 migratory metal elements (Cu, As, Cd, Pb, Bi, Ni, Sn and Sb) in copper-based food contact products by inductively coupled plasma mass spectrometry. Methods Citric acid (0.5%, m:V) was used as food simulate, and the 8 migratory metal elements in copper-based food contact products were determined by inductively coupled plasma mass spectrometry (ICP-MS). Results Linear relationships of 8 metal elements were ranged from 1 to 100 μg/L. The detection limits of 8 metal elements were ranged from 0.01 to 0.9 μg/kg, the recoveries were in the ranged of 90.3%?106.0%, and The relative standard deviation (n=7) of the repeatability test was between 1.3% and 3.4%. The migration of 8 elements in 10 batches of copper food contact products was tested and found to be detected in 5 elements (Cu, As, Pb, Ni, Sn). Conclusion The method can accurately determine the migrations of 8 metal elements (Cu, As, Cd, Pb, Bi, Ni, Sn and Sb) in copper-based food contact products, the migration amount of most elements decrease gradually with the increasing of migration times.