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

K. F. Fung, Z. Q. Zhang, Jonathan W C WONG, Ming Hung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)219-232
Number of pages14
JournalEnvironmental Geochemistry and Health
Volume25
Issue number2
DOIs
Publication statusPublished - Jun 2003

Scopus Subject Areas

  • Environmental Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Environmental Science(all)
  • Geochemistry and Petrology

User-Defined Keywords

  • Assam
  • Camellia sinensis
  • China
  • Tea plantation

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