Table 3.
Concentrations of total phenolic content (TPC) values, antioxidant capacity (AOC) (2,2-Diphenyl-2-Picrylhydrazyl - DPPH) and ferric reducing antioxidant power (FRAP)) and extraction yield in extracts produced by conventional extraction (CE) and HVED.
| ID | Sample | TPC (mg GAE/g) |
DPPH (µmol TAE/g) |
FRAP (µmol FE/g) |
Yield (%) |
Extraction Type |
|---|---|---|---|---|---|---|
| 1 | 3 OL0 | 5.32 ± 0.02 | 27.06 ± 0.01 | 63.36 ± 2.24 | 0.53 ± 0.00 | CE |
| 2 | 9 OL0 | 15.85 ± 0.11 | 31.10 ± 0.08 | 146.93 ± 3.54 | 1.58 ± 0.01 | |
| 3 | 3 OL25 | 13.35 ± 0.08 | 24.78 ± 0.05 | 150.50 ± 4.57 | 1.33 ± 0.01 | |
| 4 | 9 OL25 | 16.04 ± 0.10 | 30.46 ± 0.07 | 179.07 ± 6.09 | 1.60 ± 0.01 | |
| 5 | 3 OL50 | 14.06 ± 0.09 | 32.71 ± 0.06 | 159.79 ± 5.42 | 1.41 ± 0.01 | |
| 6 | 9 OL50 | 20.61 ± 0.14 | 33.31 ± 0.08 | 221.93 ± 6.99 | 2.06 ± 0.01 | |
| 7 | OLN1 | 49.21 ± 0.10 | 31.49 ± 0.07 | 266.21 ± 7.53 | 4.92 ± 0.01 | HVED |
| 8 | OLN2 | 29.82 ± 0.07 | 28.60 ± 0.05 | 208.36 ± 4.28 | 2.98 ± 0.01 | |
| 9 | OLN3 | 18.08 ± 0.08 | 25.96 ± 0.06 | 197.64 ± 2.00 | 1.81 ± 0.01 | |
| 10 | OLN4 | 33.12 ± 0.12 | 27.46 ± 0.08 | 199.79 ± 5.22 | 3.31 ± 0.01 | |
| 11 | OLN5 | 24.17 ± 0.05 | 31.31 ± 0.04 | 374.79 ± 6.74 | 2.42 ± 0.01 | |
| 12 | OLN6 | 26.95 ± 0.08 | 30.14 ± 0.09 | 308.36 ± 4.45 | 2.69 ± 0.01 | |
| 13 | OLN7 | 45.47 ± 0.06 | 30.49 ± 0.10 | 209.79 ± 2.01 | 4.55 ± 0.01 | |
| 14 | OLN8 | 47.21 ± 0.09 | 31.81 ± 0.08 | 229.79 ± 5.82 | 4.72 ± 0.01 | |
| 15 | OLN9 | 29.99 ± 0.07 | 28.35 ± 0.01 | 301.21 ± 4.68 | 3.00 ± 0.01 | |
| 16 | OLN10 | 28.95 ± 0.11 | 29.99 ± 0.08 | 256.21 ± 5.74 | 2.89 ± 0.01 | |
| 17 | OLN11 | 45.82 ± 0.16 | 27.96 ± 0.07 | 561.93 ± 9.11 | 4.58 ± 0.02 | |
| 18 | OLN12 | 35.03 ± 0.10 | 31.53 ± 0.02 | 284.07 ± 3.21 | 3.50 ± 0.01 | |
| 19 | OLA1 | 39.56 ± 0.08 | 30.78 ± 0.15 | 234.07 ± 2.66 | 3.96 ± 0.01 | |
| 20 | OLA2 | 32.69 ± 0.05 | 26.53 ± 0.08 | 145.50 ± 2.87 | 3.27 ± 0.00 | |
| 21 | OLA3 | 9.82 ± 0.04 | 29.71 ± 0.11 | 97.64 ± 1.15 | 0.98 ± 0.00 | |
| 22 | OLA4 | 26.69 ± 0.02 | 25.53 ± 0.08 | 169.07 ± 5.92 | 2.67 ± 0.00 | |
| 23 | OLA5 | 36.17 ± 0.04 | 29.60 ± 0.17 | 315.50 ± 4.00 | 3.62 ± 0.00 | |
| 24 | OLA6 | 31.21 ± 0.09 | 30.64 ± 0.02 | 321.21 ± 6.38 | 3.12 ± 0.01 | |
| 25 | OLA7 | 53.64 ± 0.14 | 29.85 ± 0.12 | 443.36 ± 5.21 | 5.36 ± 0.01 | |
| 26 | OLA8 | 65.99 ± 0.06 | 31.53 ± 0.01 | 237.64 ± 3.73 | 6.60 ± 0.01 | |
| 27 | OLA9 | 30.77 ± 0.05 | 26.81 ± 0.08 | 326.21 ± 2.16 | 3.08 ± 0.01 | |
| 28 | OLA10 | 21.21 ± 0.04 | 29.67 ± 0.05 | 196.21 ± 2.97 | 2.12 ± 0.00 | |
| 29 | OLA11 | 42.60 ± 0.11 | 32.53 ± 0.10 | 343.36 ± 3.01 | 4.26 ± 0.01 | |
| 30 | OLA12 | 26.43 ± 0.01 | 30.03 ± 0.08 | 354.07 ± 5.36 | 2.64 ± 0.00 |
OL = olive leaf, N = nitrogen, A = argon. For HVED, numbers 1–12 are the order of conducted treatment. For CE treatments, 3 and 9 are referred to treatment time while 0, 25, and 50 stands for concentration of an ethanol solvent (%). Percentage of yield was calculated as (g GAE/g of sample) × 100.