Determination of trace elements in drinking tea by various analytical techniques

Chu-Fang Wang; Cheng-Hsiung Ke; Jenq-Yann Yang

doi:10.1007/bf02102712

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 173: Issue 1

Determination of trace elements in drinking tea by various analytical techniques

Authors:

Chu-Fang Wang

Chu-Fang Wang National Tsing Hua University Nuclear Science and Technology Development Center Hsinchu Taiwan, R.O.C.

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Cheng-Hsiung Ke

Cheng-Hsiung Ke National Tsing Hua University Nuclear Science and Technology Development Center Hsinchu Taiwan, R.O.C.

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, and

Jenq-Yann Yang

Jenq-Yann Yang National Tsing Hua University Nuclear Science and Technology Development Center Hsinchu Taiwan, R.O.C.

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Pages:: 195–203

Online Publication Date:: 13 Sep 2005

Publication Date:: 17 Sep 1993

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02102712

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Abstract

Tea has been one of the most popular simulating beverages which is both heavily produced and consumed in Taiwan. The determination of minor or trace elements in drinking tea and tea leaves is therefore important for estimating the daily intake of Taiwanese considered as a safety indicator. In order to accurately and precisely determine the concentrations of trace elements in samples, several analytical methods such as AAS, NAA and ICP-AES are suggested. This paper attempts to utilize all three methods to determine the concentrations of minor or trace elements in different types of tea leaves and the extracts percolated from them. The influence of fermentation processes on the concentration levels of minor or trace elements in tea samples is investigated. Because only free metal ions are bioavailable for the human body, it is necessary to determine their concentrations in drinking tea. The dissolution of trace elements in drinking tea is therefore studied by simulating the common Chinese style of tea percolation. Concentrations of thirteen elements including Zn, Mn, Ca, Cu, Ni, Al, K, Mg, Cd, Pb, Na, Co and Sc are determined.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)