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Title: The behaviour of leached aluminium in tea infusions
Authors: Zhou, C.Y.
Wu, J.
Chi, H. 
Wong, M.K. 
Koh, L.L. 
Wee, Y.C. 
Keywords: aluminium
graphite furnace atomic absorption spectrometry
high performance liquid chromatography
tea and tea infusion
Issue Date: 5-Jan-1996
Citation: Zhou, C.Y., Wu, J., Chi, H., Wong, M.K., Koh, L.L., Wee, Y.C. (1996-01-05). The behaviour of leached aluminium in tea infusions. Science of the Total Environment 177 : 9-16. ScholarBank@NUS Repository.
Abstract: The behavior of leached aluminium (Al) was studied using GF-AAS with different sample pretreatments and RP-HPLC with lumogallion as the precolumn reagent. The results showed that Al species in tea infusion could be categorized into three groups: large organic compounds, small stable organic compounds and free form Al. The compositions of Al species in a tea infusion would vary with the method of the tea production. For non-fermented teas such as Long-Jin and Moli-Hua, most of the leached Al in the first tea infusion was in large organic compounds and small stable organic compounds, and free form Al consisting of less than 10%. In the case of semi-fermented and fully fermented teas such as Shuihsien and Pu-Erh, the main compositions of Al species in the first infusion were free form Al and small stable organic compounds, while Al in large organic compounds made up about 14% and 4%, respectively. When 1-g tea leaves were infused with 100 ml boiling water, about 21% Al in the tea leaves was leached into the water in the first infusion and a total of about 27% of the Al in the tea leaves was leached into the water in four infusions.
Source Title: Science of the Total Environment
ISSN: 00489697
DOI: 10.1016/0048-9697(95)04854-5
Appears in Collections:Staff Publications

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