Table 2.
Total phenolic content (TPC) and antiradical activity of selected black teas.
| Tea | TPC * (mg/100 mL) | SD | Antiradical Activity (%) | SD | Trolox Equivalent (mM/L) | SD |
|---|---|---|---|---|---|---|
| CH (China) | 17.5 a | 1.73 | 33.6 | 3.19 | 1.74 | 0.18 |
| JA (Japan) | 28.4 b | 2.62 | 35.6 | 5.28 | 1.85 | 0.16 |
| K (Kenya) | 49.9 c | 5.12 | 75.6 | 8.80 | 2.55 | 0.22 |
| I (India) | 58.2 c | 6.16 | 84.5 | 7.31 | 3.11 | 0.34 |
| S (Sri Lanka) | 33.8 b | 4.28 | 54.8 | 7.70 | 1.97 | 0.21 |
| IR (Iran) | 20.2 a | 3.11 | 31.8 | 4.20 | 1.51 | 0.14 |
| NH (Nepal) | 52.7 c | 4.78 | 82.6 | 9.43 | 3.00 | 0.22 |
| NM (Nepal) | 44.0 c | 5.05 | 73.4 | 8.48 | 2.38 | 0.23 |
* expressed as gallic acid equivalents; different letters by column are statistically significantly different at p < 0.05.