| 江苏绿茶中稀土元素的组成特征及分布模式 |
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| 引用本文： | 王峰,曹福亮.江苏绿茶中稀土元素的组成特征及分布模式[J].南京林业大学学报(自然科学版),2012,36(4):71-74. |
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| 作者姓名： | 王峰 曹福亮 |
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| 作者单位： | 1. 南京林业大学森林资源与环境学院,江苏 南京210037;江苏省产品质量监督检验研究院,江苏 南京210007
2. 南京林业大学森林资源与环境学院,江苏 南京,210037 |
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| 摘 要： | 通过测定绿茶中稀土元素(REE)含量,研究江苏绿茶的REE组成特征及分布模式。采用微波消解及电感耦合等离子体质谱法(ICP-MS)测定9个品种的江苏绿茶中15种稀土元素含量,采用SPSS统计软件进行数据分析。结果表明:江苏绿茶的REE、轻稀土和重稀土含量分别为0.917、0.720和0.197μg/g;绿茶明显富集轻稀土,而轻、重稀土间则存在较大的分馏作用;江苏绿茶中的稀土分布模式与江苏镇江土壤和中国大陆土壤(平均值)中的稀土分布模式较接近;江苏绿茶中的REE总量普遍低于2.0 mg/kg,食用安全风险相对较小;轻稀土的生物学效应比重稀土更为显著;稀土元素沿绿茶的迁移传递中没有表现出明显的生物放大作用。
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| 关 键 词： | 稀土元素 绿茶 电感耦合等离子体质谱 分布模式 |
Contents and distribution patterns of rare earth elements in green tea from Jiangsu province |
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| WANG Feng
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CAO Fuliang.Contents and distribution patterns of rare earth elements in green tea from Jiangsu province[J].Journal of Nanjing Forestry University(Natural Sciences ),2012,36(4):71-74. |
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| Authors: | WANG Feng CAO Fuliang |
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| Institution: | 1(1.College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China;2.Jiangsu Provincial Supervising & Testing Research Institute for Product Quality,Nanjing 210007,China) |
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| Abstract: | Fifteen kinds of rare earth elements(REEs) in nine varieties of green tea from Jiangsu province were determined by inductively coupled plasma-mass spectrometry(ICP-MS).The data was analyzed by SPSS statistics software to research the distribution patterns of REEs.The results showed that the concentrations of total REEs(TR),light REEs(LREEs) and heavy REEs(HREEs) in green tea were 0.917,0.720,0.197 μg/g,respectively.Enrichment of LREE in tea suggested higher biological effects of LREE than those of HREE.There was large fractionation between LREEs and HREEs.The distribution patterns of REE in green tea were similar to those of soils of Zhenjiang city and the mainland.Because the TR in green tea was less than 2.0 mg/kg,it’s safe to eat.The migration of REE along green tea from Jiangsu province showed no obvious biomagnifications.The research could offer a technological support for the quality control and classification of green tea. |
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| Keywords: | rare earth element green tea ICP-MS distribution pattern |
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