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Assessing Geographic Origins of Green Teas Using Instruments
Jung Hyen Jang,Euk Seob Kim,Shu Yu Wu,Jian Liang Lu,Hui Ling Liang,Ying Ying Du,Chen Lin,Yue Rong Liang 한국식품과학회 2008 Food Science and Biotechnology Vol.17 No.5
Parameters of soluble solids, amino acids, catechins, and color difference of 24 green tea samples from China and Korea were determined. The levels of soluble solids, amino acids, total catechins, and infusion lightness in tea samples from Korea were higher than those from China. Concentrations of epigallocatechin galate and epigallocatechin in teas from China were higher than tea samples from Korea. Geographical origin of teas from the 2 countries was discriminated using parameters of infusion lightness, gallocatechin, and total catechins and applying principal component analysis.