Table 1.
The contents of tea polyphenols and catechins of different fractions from Qingzhuan tea water extract (mg/g)
| Total polyphenols | Total catechins | Individual catechin | |||||
|---|---|---|---|---|---|---|---|
| C | EC | EGC | ECG | EGCG | |||
| Chloroform fraction | 9.8 ± 0.57e | 3.6 ± 0.59c | 3.6 ± 0.59 | ND | ND | ND | ND |
| Ethyl acetate fraction | 787. 2 ± 26.32a | 331.4 ± 9.54a | 86.5 ± 0.89 | 21.2 ± 0.21 | 23.1 ± 0.89 | 53.7 ± 0.38 | 146.9 ± 8.60 |
| n-Butanol fraction | 310.9 ± 7.25b | 28.1 ± 0.67b | 19.8 ± 1.07 | ND | 6.6 ± 0.20 | 1.7 ± 0.07 | ND |
| Sediment fraction | 91.6 ± 3.54d | ND | ND | ND | ND | ND | ND |
| Residial aqua fraction | 111.5 ± 3.13c | 4.9 ± 0.29c | 4.9 ± 0.29 | ND | ND | ND | ND |
n = 3, Mean ± SD
Values with no letter in common are significantly different (p < 0.05)
C, (+)-catechin; EC, (-)-epicatechin; EGC, (-)-epigallocate-chin; ECG, (-)-epicatechin gallate; EGCG, (-)-epigallocatechin gallate
ND means not detected