Table 2.
Content of total phenols (TP) and antioxidant capacity (FRAP) of Harpagophytum extracts, presented as mean with standard deviation per dry weight (dw) of the plant material (GAE: gallic acid equivalents).
| Accession | Total phenols (mg GAE/g dw) | FRAP (µmol Fe2+/g dw) | ||
|---|---|---|---|---|
| Mean | SD | Mean | SD | |
| 3 | 28.9 | 0.4 | 596.7 | 25.2 |
| 11 | 13.5 | 0.6 | 204.8 | 0.1 |
| 14 | 25.1 | 1.3 | 444.3 | 13.0 |
| 16 | 5.1 | 0.3 | 80.8 | 13.2 |
| 17 | 2.1 | 0.4 | 33.8 | 0.2 |
| 24 | 3.5 | 0.5 | 54.5 | 5.6 |
|
| ||||
| Standard: harpagide | 16.7 | 1.1 | 149.2 | 0.0 |
| Standard: harpagoside | 0.0 | 0.0 | 612.3 | 3.2 |
| Standard: verbascoside | 359.9 | 9.8 | 5854.2 | 52.7 |