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.
CitationFung, 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
- Camellia sinensis
- Tea plantation