Journal
FOOD CHEMISTRY
Volume 106, Issue 4, Pages 1467-1475Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2007.05.098
Keywords
tea infusion; water composition; extraction mechanism
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Tea infusion is the second world wide consumed beverage. In this study, total aluminium and calcium concentrations, total organic carbon and total polyphenol content were determined and compared with respect to the origin of tea leaves, their particle size (broken or whole leaves) and also the mineral composition of four waters. It appeared that the higher the mineral content, the lower the extraction yield of aluminium, total organic carbon and total polyphenols. This could be due to calcium uptake by leaves. Calcium present in mineral waters could be complexed with pectins present in cell walls thus leading to a decrease in the element extraction. (c) 2007 Elsevier Ltd. All rights reserved.
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