Determination of the chemical composition of tea by chromatographic methods: a review

Yashin, A. Y., Nemzer, B. V., Combet, E. and Yashin, Y. I. (2015) Determination of the chemical composition of tea by chromatographic methods: a review. Journal of Food Research, 4(3), pp. 56-87. (doi:10.5539/jfr.v4n3p56)

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Abstract

Despite the fact that mankind has been drinking tea for more than 5000 years, its chemical composition has been studied only in recent decades. These studies are primarily carried out using chromatographic methods. This review summarizes the latest information regarding the chemical composition of different tea grades by different chromatographic methods, which has not previously been reviewed in the same scope. Over the last 40 years, the qualitative and quantitative analyses of high volatile compounds were determined by GC and GC/MS. The main components responsible for aroma of green and black tea were revealed, and the low volatile compounds basically were determined by HPLC and LC/MS methods. Most studies focusing on the determination of catechins and caffeine in various teas (green, oolong, black and pu-erh) involved HPLC analysis.

Knowledge of tea chemical composition helps in assessing its quality on the one hand, and helps to monitor and manage its growing, processing, and storage conditions on the other. In particular, this knowledge has enabled to establish the relationships between the chemical composition of tea and its properties by identifying the tea constituents which determine its aroma and taste. Therefore, assessment of tea quality does not only rely on subjective organoleptic evaluation, but also on objective physical and chemical methods, with extra determination of tea components most beneficial to human health. With this knowledge, the nutritional value of tea may be increased, and tea quality improved by providing via optimization of the growing, processing, and storage conditions.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Combet Aspray, Dr Emilie
Authors: Yashin, A. Y., Nemzer, B. V., Combet, E., and Yashin, Y. I.
College/School:College of Medical Veterinary and Life Sciences
Journal Name:Journal of Food Research
Publisher:Canadian Center of Science and Education
ISSN:1927-0887
ISSN (Online):1927-0895
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Journal of Food Research 4(3):56-87
Publisher Policy:Reproduced under a Creative Commons License

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