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Chemical compositions of various grades of Mat-cha (5000, 4000, 3000, 2000, and 1000 yen/40g) were determined.Contents of total nitrogen, caffeine and free amino acids and an amide (theanine) were decre ased with decreasing the price of Mat-cha.Vitamine C contents of these were lower than that of Sen-cha, and Vitanine C contents of high grade Mat-cha (>3000 yen/40g) were higher than those of low grade Mat-cha (<2000 yen/40g).Contens of free reducing suggar and vitamine E were not different amang Mat-chas.Free arginine, asparatic acid, glutamic acid, threonine and theanine (amide) in Mat-cha were decreased with decreasing the price of Mat-cha.
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IKEGAYA et al. (1984) studied this question.
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