Chemical composition of Japanese green tea exhibited in the Hyogo prefecturel [Japan] tea competition
2002
"Ogawa, T. (Hyogo-ken. Agricultural Inst., Kasai (Japan)) | Tahata, K. | Inoue, Y. | Nakagawa, K. "
"Chemical composition of Japanese green tea (Sen-cha) exhibited in the Hyogo prefetcural tea competition was analyzed. (1) The content of total nitrogen and individual free amino acid of exhibited Sen-cha that was higher prizes was higher than those in the low ranks. (2) The content of caffeine in the higher prizes was higher than that in the low ranks. The content of ascorbic acid in the exhibited Sen-cha showed no difference. (3) The total catechin content ranged from 12 to 13%. Epigallocatechin gallate content was the highest of all catechins in Sen-cha. There was little difference in the content of epigallocatechin gallate. (4) From the analyses of various components, the quality of the exhibited Sen-cha was the same level as middle or upper grade Sen-cha found in the market."
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