J4 ›› 2013, Vol. 12 ›› Issue (10): 47-49.

• 生命科学 • 上一篇    下一篇

不同地区茶叶中微量元素的测定

  

  1. 大理学院公共卫生学院,云南大理 671000
  • 收稿日期:2013-04-18 修回日期:2013-05-31 出版日期:2013-10-15 发布日期:2013-10-15
  • 作者简介:徐瑞, 预防医学专业2010级本科生.
  • 基金资助:

    大理学院大学生科研基金资助项目(KYSX2012040)

The Determination of Trace Elements in Three Kinds of Tea from Different Places

  1. College of Public Health, Dali University, Dali, Yunnan 671000, China
  • Received:2013-04-18 Revised:2013-05-31 Online:2013-10-15 Published:2013-10-15

摘要:

目的:对云南普洱茶、贵州苦丁茶、河北茉莉花茶中的锌(Zn)、铁(Fe)、铜(Cu)、锰(Mn) 4种微量元素进行测定。方法:将样品用干法进行消解,并利用火焰原子吸收光谱法测定3种茶叶中Zn、Fe、Cu、Mn 4种微量元素的含量。结果:Zn、Fe、Cu、Mn 4种微量元素在3个地区茶叶中含量分别是云南普洱茶:43.43μg/g 、57.28μg/g 、33.14μg/g 、135.67μg/g ;贵州苦丁茶:19.91μg/g 、32.98μg/g 、9.74μg/g 、77.08μg/g ;河北茉莉花茶:36.09μg/g 、84.37μg/g 、28.52μg/g 、220.08μg/g 。结论:3种茶叶中均含有丰富的微量元素,不同地区茶叶中微量元素含量有一定差异。

关键词: 茶叶, 微量元素, 原子吸收

Abstract:

Objective: To determinate the content of the trace elements(Fe, Mn, Zn, Cu)in Yunnan Pu'er tea, Hebei jasmine tea,
Guizhou Kuding tea. Methods: Nitric acid and perchloric acid(4+1)were used to disintegrate the ground sample of tea. Flame atomic absorption spectrometric method was used to determine four trace elements content in three kinds of tea. Results: The content of trace elements(Zn, Fe, Cu, Mn)in three districts is respectively that Yunnan Pu'er tea: 43.43 μg/g , 57.28 μg/g , 33.14 μg/g , 135.67μg/g , Guizhou kuding tea: 19.91 μg/g, 32.98 μg/g, 9.74 μg/g, 77.08 μg/g, Hebei Jasmine tea: 36.09 μg/g, 84.37 μg/g, 28.52 μg/g,220.08 μg/g . Conclusion: All three kinds of tea contain rich trace elements and there are differences about the content of trace elements in different areas.

Key words: tea, trace elements, atomic absorption

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