Table 6.
Concentration of gallic acid and catechins in the green tea infusions.
| Parameter | GA ** | C ** | EGC ** | EGCG ** | ECG ** | EC ** | Total |
|---|---|---|---|---|---|---|---|
| CH (China) | |||||||
| Mean (mg/100 mL) | 6.34 | 24.9 | 76.7 | 107 | 86.2 | 41.7 | 343 |
| SD | 1.10 | 2.28 | 8.21 | 10.9 | 2.02 | 4.11 | |
| Range | 4.79–8.14 | 21.1–28.1 | 61.2–86.1 | 91.8–121 | 83.3–89.1 | 36.3–49.3 | |
| CH1 (China) | |||||||
| Mean (mg/100 mL) | 5.27 | 13.7 | 141 | 107 | 51.5 | 32.1 | 351 |
| SD | 0.51 | 0.92 | 11.4 | 3.14 | 3.60 | 3.69 | |
| Range | 4.16–5.81 | 11.9–14.9 | 128–160 | 103–113 | 44.8–56.2 | 26.4–37.8 | |
| I (India) | |||||||
| Mean (mg/100 mL) | 5.62 | 11.1 | 117 | 113 | 57.5 | 30.7 | 334 |
| SD | 0.16 | 0.87 | 4.34 | 6.88 | 1.98 | 3.22 | |
| Range | 5.35–5.85 | 9.87–12.2 | 109–124 | 103–123 | 53.1–59.4 | 25.8–35.8 | |
| SL (Sri Lanka) | |||||||
| Mean (mg/100 mL) | 10.6 | 19.8 | 157 | 123 | 59.0 | 35.1 | 404 |
| SD | 2.37 | 3.57 | 18.5 | 10.4 | 8.36 | 5.76 | |
| Range | 7.12–14.8 | 15.2–24.5 | 123–180 | 108–139 | 49.8–73.4 | 27.5–44.6 | |
| N (Nepal) | |||||||
| Mean (mg/100 mL) | 3.72 | 8.28 | 107 | 115 | 62.6 | 28.6 | 325 |
| SD | 0.95 | 1.77 | 8.21 | 8.54 | 7.40 | 4.46 | |
| Range | 2.81–5.35 | 6.15–11.5 | 96.5–119 | 102–129 | 52.3–74.5 | 22.6–34.8 | |
| SKJ (South Korea) | |||||||
| Mean (mg/100 mL) | 1.66 | 18.3 | 213 | 111 | 48.6 | 49.4 | 441 |
| SD | 0.08 | 1.72 | 28.1 | 8.10 | 4.81 | 3.48 | |
| Range | 1.54–1.83 | 15.8–21.3 | 175–249 | 101–123 | 43.3–56.2 | 44.2–54.5 | |
| JA (Japan) | |||||||
| Mean (mg/100 mL) | 2.46 | 17.8 | 180 | 110 | 50.9 | 41.8 | 403 |
| SD | 0.34 | 1.15 | 21.3 | 5.99 | 4.67 | 4.64 | |
| Range | 2.11–2.93 | 16.4–19.8 | 145–212 | 101–118 | 44.5–58.5 | 36.9–49.4 | |
| JM (Japan) | |||||||
| Mean (mg/100 mL) | 1.44 | 12.1 | 190 | 112 | 47.8 | 45.9 | 409 |
| SD | 0.03 | 1.27 | 24.8 | 7.30 | 4.74 | 2.48 | |
| Range | 1.39–1.48 | 10.1–13.9 | 158–231 | 99.4–122 | 41.1–54.8 | 41.8–50.8 | |
| JS (Japan) | |||||||
| Mean (mg/100 mL) | 1.65 | 12.1 | 200 | 124 | 54.5 | 43.5 | 435 |
| SD | 0.07 | 0.67 | 12.0 | 3.43 | 1.09 | 0.96 | |
| Range | 1.55–1.78 | 11.3–13.3 | 187–218 | 118–129 | 52.3–55.7 | 41.2–44.5 | |
| Mean (mg/100 mL) | 4.30 | 15.4 | 153 | 114 | 57.6 | 38.8 | 383 |
| SD | 2.98 | 5.22 | 47.0 | 9.26 | 12.1 | 7.87 | |
| Range | 1.39–14.8 | 6.15–28.1 | 61.2–249 | 91.8–139 | 41.1–89.1 | 22.6–54.5 | |
* CH—China (original); CH1—China (blended); I—India; SL—Sri Lanka; N—Nepal; SKJ—Jeoncha (South Korea); JA—Agari (Japan); JM—Matcha (Japan); JS—Sencha (Japan); ** GA—gallic acid; C—catechin; EGC—epigallocatechin; EGCG—epigallocatechin-3-gallate; ECG—epicatechin gallate; EC—epicatechin.