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投稿时间：2019-08-25
投稿时间：2019-08-25
中文摘要: 为掌握不同产区菊花中稀土元素（rare earth elements，REEs）的含量和分布状况，并利用REEs元素对菊花产地进行判别，菊花样品使用双氧水-硝酸进行微波消解，采用电感耦合等离子体质谱仪（inductively coupled plasma mass spectrometer，ICP-MS）测定其REEs。结果表明，REEs各元素在0～50 μg/L浓度范围内线性关系良好，各REEs相关系数在0.999 6以上，方法检出限在0.03 μg/kg～0.60 μg/kg范围，标准物质测定结果在其参考值范围内。通过3个主要产地91个菊花样品中REEs含量的分析，发现来自不同地区的菊花样品中REEs含量差异较大，其中产于浙江桐乡的菊花样品中稀土氧化物（rare earth oxides，REOs）总量平均值达到1.747 9 mg/kg，显著高于其他两个地区；产于黄山的菊花样品中轻稀土（light rare earth elements，LREE）占稀土总量的68.77%，显著低于其他两个地区；3个产地的样品中轻稀土和重稀土（heavy rare earth elements，LREE）之间的比例接近。REEs含量通过分析，来自黄山的菊花样品达到了较好的区分效果。
中文关键词: 微波消解 电感耦合等离子体质谱 菊花 稀土 元素
Abstract:To know the content and distribution of rare earth elements elements（REEs）in chrysanthemum in different producing areas，and futher to use REES to determine the origin producing areas of chrysanthemum，chrysanthemum samples were digested by hydrogen peroxide and nitric acid，and the ICP-MS was employed to count the REEs.The results showed that there were good linear relationships among REEs in the concentration range of 0-50 μg/L.The correlation coefficients of each REEs were above 0.999 6，and the detection limit of the method was in the range of 0.03 μg/kg-0.60 μg/kg.The measurement results of the standard substance were within its reference value range.By analyzing the 91 samples from 3 main producing areas，we found the content of REEs in samples from different areas was quite different.and the average content of rare earth oxides（REOs）in samples from Tongxiang，Zhejiang province was significantly higher than the others，which was 1.7479 mg/kg.Light rare earth elements（LREE）in chrysanthemum samples from Huangshan accounted for 68.77%of the total REEs，which was significantly lower than the other two regions.The ratio of LREE to heavy rare earth elements（HREE）in samples from 3 producing areas was close to each other.REEs content analysis showed that chrysanthemum samples from Huangshan had achieved good discrimination effect.
keywords: microwave digestion inductively coupled plasma mass spectrometer（ICP-MS） chrysanthemum rare earth elements（REEs） element
文章编号：202015028 中图分类号： 文献标志码：
基金项目:现代农业产业技术体系建设专项基金（CARS-19）
| 作者 | 单位 |
| 黄聪薇，洪一苇，金寿珍，张琳，冯明慧，章剑扬，刘新 | 中国农业科学院茶叶研究所农业农村部茶叶产品质量安全风险评估实验室，浙江杭州310008；中国农业科学院茶叶研究所农业农村部茶叶质量安全控制重点实验室，浙江杭州310008；桐乡市农业技术推广服务中心，浙江桐乡314500 |
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