Table 2.
Content of phenolics, proanthocyanidins in P. granatum samples and their antioxidative potential.
| Sample | Total Phenols 1,2 (mg/g) |
Proanthocyanidins 3 (mg/g) |
Antioxidant Activity 4 (% Inhibition) |
|---|---|---|---|
| EtOH peel extract | 24.0599 ± 2.5381 | 3.0549 ± 0.5145 | 90.4518 ± 3.7013 |
| EtOH lyophilized peel extract | 16.7613 ± 3.1294 | 1.3687 ± 0.1807 | 90.0512 ± 2.4588 |
| H2O peel extract | 13.5547 ± 1.0058 | n.d. 5 | 14.2666 ± 1.0647 |
| H2O lyophilized peel extract | 23.3928 ± 1.9437 | 1.7882 ± 0.1234 | 90.3405 ± 3.2261 |
| EtOH seed extract | 15.8798 ± 2.4136 | 4.6710 ± 0.7951 | 15.8256 ± 1.2304 |
| EtOH lyophilized seed extract | 20.1662 ± 2.2164 | 1.5924 ± 0.0243 | 18.2951 ± 2.5168 |
| H2O seed extract | n.d. | 0.0035 ± 0.0011 | 10.1714 ± 3.4629 |
| H2O lyophilized seed extract | n.d. | 0.0068 ± 0.0029 | 14.0128 ± 1.6531 |
| Fresh juice | 3.6387 ± 0.1469 | 0.0755 ± 0.0076 | 5.3416 ± 0.9846 |
| Lyophilized juice | 7.5588 ± 0.5627 | 0.8406 ± 0.0143 | 7.6564 ± 1.3154 |
1 Concentration based upon gallic acid as standard. 2 Data in parentheses expressed as mg gallic acid equivalents (GAE) per gram of extract/juice. 3 Concentration expressed as mg of proanthocyanidins (PAC) per gram of extract/juice. 4 % DPPH• radical scavenging activity. 5 n.d.—not detected. Values represent mean of three replicates ± standard error.