Table 1.
Total phenolic contents and antioxidant activities of seven Thai medicinal plant extracts
| Total phenolic (mM GAE/g) |
DPPH (IC50, mg/ml) |
ABTS (IC50, mg/ml) |
FRAP (mM Fe2+/g) |
|
|---|---|---|---|---|
| Caesalpinia sappan | 220.52 ± 4.47 | 1.17 ± 0.06 | 2.57 ± 0.16 | 334.78 ± 13.15 |
| Garcinia mangostana | 91.16 ± 4.62 | 4.82 ± 0.58 | 4.98 ± 0.10 | 46.12 ± 1.27 |
| Houttuynia cordata | 14.25 ± 0.20 | 97.79 ± 4.14 | 72.02 ± 4.01 | 8.55 ± 0.18 |
| Perilla frutescens | 29.86 ± 0.41 | 11.68 ± 0.51 | 21.37 ± 1.28 | 43.32 ± 0.92 |
| Clinacanthus nutans | 25.52 ± 0.22 | 50.34 ± 5.60 | 37.82 ± 1.25 | 18.39 ± 0.54 |
| Phyllanthus emblica | 44.35 ± 0.24 | 3.49 ± 0.17 | 4.95 ± 0.11 | 94.17 ± 0.62 |
| Tiliacora triandra | 30.45 ± 1.51 | 17.77 ± 0.22 | 21.16 ± 1.06 | 30.58 ± 1.13 |
DPPH 2,2-diphenyl-1-picrylhydrazyl, ABTS 2,2-azino-bis (3-ethylbenzothiazo-line-6-sulfonic acid) diammonium salt, FRAP ferric reducing antioxidant power, GAE gallic acid equivalents, IC50 half maximal inhibitory concentration