2013•Dali Xueyuan xuebaoRequires access

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

Xu Ru

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 atom ic 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 ele ments in different areas.

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Key concepts: Chemistry, Atomic absorption spectroscopy, Nitric acid, TRACE (psycholinguistics), Trace element, Environmental chemistry, Inorganic chemistry, Physics