Volume 38, Issue 5 pp. 533-537
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Aluminium content in tea leaves and in differently prepared tea infusions

Dr. K. S. Jagannatha Rao Scientist

Corresponding Author

Dr. K. S. Jagannatha Rao Scientist

Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore, India

Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore 570013, IndiaSearch for more papers by this author
First published: 1994
Citations: 11

Abstract

en

Aluminium content of tea leaves has been engaging the attention during recent years because of its uptake in the form of beverages such as tea. Hence, data were generated on the Al content in tea and its infusions, using an inductively coupled plasma spectrometer. The average values of Al in fresh tea leaves and commercial tea powders were 250 and 325 μg/g dry wt, respectively. Tea infusions contained 20–80 μg/g of Al. Al complexes with tea components like tannic acid and theoflavins were studied and stability characteristics as well as the nature of the complexes were computed.

Abstract

de

Aluminiumgehalt von Teeblättern und unterschiedlich hergestellten Teeaufgüssen

In den letzten Jahren hat der Aluminiumgehalt von Teeblättern wegen dessen Aufnahme in Form von Teegetränken Aufmerksamkeit erlangt. Es sind deshalb unter Verwendung eines Spektrometers mit induktiv gekoppeltem Plasma Al-Gehalte in Teeblättern und -aufgüssen bestimmt worden. Die durchschnittlichen Werte betragen in frischen Teeblättern und in handelsüblichen Teepulvern (berechnet auf Trockensubstanz) 250 bzw. 325 μg Al/g. Teeaufgüsse enthielten 20–80 μg Al/g. Weiterhin sind Aluminiumkomplexe mit Teekomponenten wie Tannin und Theoflavinen untersucht sowie deren Stabilitätscharakteristika und die Art der Komplexe errechnet worden.

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