Table 1 The concentrations of amino acid, caffeine and catechins in the green tea samples

Amino acids (nmol/ml)

aspartic acid

118.52

339.07

threonine

16.82

88.25

serine

45.68

175.81

asparagine

11.22

487.45

glutamic acid

122.30

256.41

glutamine

157.13

428.93

theanine

401.12

1198.58

alpha-aminoadipic acid

6.94

32.65

glycine

5.71

15.01

alanine

ND

91.05

valine

23.38

55.21

cystine

3.57

15.24

isoleucine

5.15

38.29

leucine

7.43

25.52

gamma-aminobutyric acid

5.68

9.64

histidine

3.27

31.78

lysine

7.10

25.87

arginine

70.71

550.54

Caffeine and catechins (mg/250 ml)

caffeine

87.47

191.60

catechins

303.78

223.08