Table 7.
Antioxidant activity of the eight accessions of H. sabdariffa. Sample No. corresponds to Table 4.
| Samples | Regression Equation | R2 | IC50 (µg/mL, Dry Weight Basis for Leaf) |
|---|---|---|---|
| 1 | y = 0.2776·x + 5.1522 | 0.9932 | 161.91 |
| 2 | y = 0.2767·x + 7.3187 | 0.9897 | 154.65 |
| 3 | y = 0.2190·x + 5.1677 | 0.9945 | 204.72 |
| 4 | y = 0.2092·x + 8.1093 | 0.9937 | 200.29 |
| 5 | y = 0.2730·x + 6.9611 | 0.9931 | 157.65 |
| 6 | y = 0.2117·x + 9.2249 | 0.9944 | 192.61 |
| 7 | y = 0.1818·x + 5.2144 | 0.9987 | 247.44 |
| 8 | y = 0.1729·x + 14.2790 | 0.9935 | 207.73 |
| Bamboo leaves | y = 0.2497·x + 0.7810 | 0.9908 | 197.67 |
| Rutin | y = 10.492·x + 2.3650 | 0.9941 | 4.54 |
| Neochlorogenic acid | y = 9.9885·x - 0.2967 | 0.9992 | 5.04 |
| Chlorogenic acid | y = 9.6473·x + 1.5983 | 0.9982 | 5.02 |
| Cryptochlorogenic acid | y = 9.5822·x − 0.4380 | 0.9980 | 5.26 |
| Isoquercitrin | y = 12.059·x + 7.5899 | 0.9947 | 3.52 |