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目的了解福州市售食品中稀土元素的含量,分析研究不同类别食品中稀土元素含量分布。方法在福州市采集7类食品共92份样本,采用电感耦合等离子体质谱法(ICP-MS)测定钇、镧、铈、镨、钕、钐、铕、钆、铽、镝、铒、钬、铥、镱、镥等15种稀土元素,并选择国家一级标准物质茶叶和灌木枝叶作为定量分析的质量控制。结果茶叶中稀土含量超标率为70%,食用菌中稀土含量较高,蛋类最低,其余4类食品粮食、蔬菜、水产品和肉类中稀土含量无显著差异。结论茶叶和食用菌中稀土含量较高,应加强对茶叶和食用菌的定期监测。
Objective To understand the contents of rare earth elements in foods sold in Fuzhou and analyze the distribution of rare earth elements in different kinds of foods. Methods A total of 92 samples of 7 kinds of foods were collected in Fuzhou City. The contents of yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, erbium and holmium were determined by inductively coupled plasma mass spectrometry (ICP-铥, ytterbium, 镥 and other 15 kinds of rare earth elements, and select the national standard of tea leaves and shrubs and leaves as a quantitative analysis of quality control. Results The exceeding rate of rare earth in tea was 70%, the content of rare earth in edible fungus was the highest, and the lowest in eggs. There was no significant difference in the content of rare earth among the other four kinds of foodstuffs, vegetables, aquatic products and meat. Conclusion The content of rare earth in tea and edible fungi is high, and regular monitoring of tea and edible fungi should be strengthened.