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Aluminium content in tea leaves and in differently prepared tea infusions

โœ Scribed by Rao, K. S. Jagannatha


Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
292 KB
Volume
38
Category
Article
ISSN
0027-769X

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โœฆ Synopsis


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 pg/g dry wt., respectively. Tea infusions contained 20-80 pg/l 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.

Zusarnrnenfassung

Aluminiumgehalt von Teeblattern und unterschiedlich hergestellten Teeaufgiissen In den letzten Jahren hat der Aluminiumgehalt von Teeblattern wegen dessen Aufnahme in Form von Teegetranken Aufmerksamkeit erlangt. Es sind deshalb unter Verwendung eines Spektrometers mit induktiv gekoppeltem Plasma Al-Gehalte in Teeblattern und -aufgiissen bestimmt worden. Die durchschnittlichen Werte betragen in frischen Teeblattern und in handelsublichen Teepulvern (berechnet auf Trockensubstanz) 250 bzw. 325 pg Al/g. Teeaufgusse enthielten 20-80 pg Al/g. Weiterhin sind Aluminiumkomplexe mit Teekomponenten wie Tannin und Theoflavinen untersucht sowie deren Stabilitatscharakteristika und die Art der Komplexe errechnet worden.


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