Aluminium and fluoride concentrations of three tea varieties growing at Lantau Island, Hong Kong

K. F. FUNG, Z. Q. ZHANG, J. W. C. WONG, Ming Hung WONG

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Abstract

The present project aims to investigate aluminium (Al) and fluoride (F) contents in teas (Camellia sinensis (L.) O. Kuntze). Three different commercial tea varieties: Assam variety and two China sub-varieties, a large leafed variety and small leafed variety, were collected in two tea gardens of Lantau Island tea plantation of Hong Kong. In general, high concentrations of Al and F were accumulated in the mature leaves (15.3 and of 2.07 g kg⁻¹ respectively). Among the three varieties, 'the small leafed' variety exhibited the highest Al and F contents followed by the 'large leafed' variety whereas the Assam variety had the lowest Al and F concentrations in its tea bushes. Tea products from a plantation were also analysed and it was noted that black tea had higher Al and F concentrations than green tea. The amount of Al and F released into tea liquor was also tested and the results showed that higher concentrations of Al and F were released into tea liquor under repeated infusion method than continuous infusion method. Copyright © 2003 Kluwer Academic Publishers.

Original languageEnglish
Pages (from-to)219-232
JournalEnvironmental Geochemistry and Health
Volume25
Issue number2
DOIs
Publication statusPublished - Jun 2003

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aluminum fluoride
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Citation

Fung, K. F., Zhang, Z. Q., Wong, J. W. C., & Wong, M. H. (2003). Aluminium and fluoride concentrations of three tea varieties growing at Lantau Island, Hong Kong. Environmental Geochemistry and Health, 25(2), 219-232. doi: 10.1023/A:1023233226620

Keywords

  • Assam
  • Camellia sinensis
  • China
  • Tea plantation