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Web End = Eur Food Res Technol (2015) 241:289293 DOI 10.1007/s00217-015-2456-4
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Web End = Lithium content in the tea and herbal infusions
Dugaszek Maria1 Kurpiewska Zaneta2 Mierczyk Jadwiga1
Abstract Tea infusions provide many valuable nutrients, including elements. Lithium (Li) is an element which appears rather in small amounts both in environment and in the human tissues or body uids. Now it is known that it plays a part in many important vital functions. Content of Li in food products is generally small, which is associated with its low consumption. The aim of the study was to examine the concentration of Li in the infusions prepared from different sort of teas available in the market. The content of Li was examined in 55 infusions of black, green, red, fruit and herbal teas. Quantitative studies were performed using atomic absorption spectrometry with atomization in graphite furnace. The largest amount of Li was extracted from the leaves of red tea and rooibos as well as some herbal teas. The determined content of Li in tea infusions was in the range 0.021.36 g/g of tea, and 1 cup (250 mL) of analysed infusions (together with a tap water) provides 2.23.0 g of Li.
Keywords Lithium Teas Herbs Infusions GFAAS
Introduction
So far, little is known about the content of Li in living organisms and its role in life processes. In human body is
* Dugaszek Maria [email protected]
1 Institute of Optoelectronics, Military Universityof Technology, ul. gen. Sylvester Kaliski 2, Warsaw 49, Poland
2 Department of Chemistry and New Technologies, Military University of Technology, ul. gen. Sylvester Kaliski 2, Warsaw 49, Poland
Received: 20 January 2015 / Revised: 13 March 2015 / Accepted: 18 March 2015 / Published online: 28 March 2015 Springer-Verlag Berlin Heidelberg 2015
about 7 mg of Li. Concentration of this element in human physiological uids and tissues is rather low: plasma 1.818.8 g/L, blood 0.41.0 g/L (in patients undergoing therapy with Li up to 1000 times more), urine 12 g/L (4,6 219 g/L) and 9.6 g/L (median value), breast milk <1 g/L and hair...