Table 4.
Content of phenolic compounds in the examined ripe olive extracts (in NADESs or water) from HPLC analysis a.
| Solvent | Time (min) | Demethyloleuropein [ppm] b |
3,4-DHPEA-EDA [ppm] b |
Oleuropein [ppm] b |
|---|---|---|---|---|
| NADES-1 | 10 | ND | ND | ND |
| 30 | ND | ND | ND | |
| NADES-2 | 10 | 284.67 ± 1.13 | 156.64 ± 1.81 | 88320.90 ± 38.03 |
| 30 | 1019.84 ± 0.53 | 480.60 ± 0.55 | 37602.42 ± 1.21 | |
| NADES-3 | 10 | 1918.761 ± 1.88 | ND | 52643.39 ± 51.7 |
| 30 | 4527.07 ± 18.19 | 193.15 ± 0.55 | 23338.72 ± 10.50 | |
| NADES-4 | 10 | 1655.97 ± 2.03 | 420.92 ± 1.92 | ND |
| 30 | 903.79 ± 2.15 | ND | ND | |
| NADES-5 | 10 | ND | 637.06 ± 1.74 | ND |
| 30 | 174.95 ± 0.93 | 25.69 ± 1.73 | 42534.86 ± 12.12 | |
| Water | 10 | 4000.52 ± 2.15 | 503.05 ± 1.31 | ND |
| 30 | 5602.64 ± 8.72 | 783.25 ± 3.23 | ND |
a Htyrosol, tyrosol, 3,4-DHPEA-EDA are in an amount not detectable by HPLC. b Data are expressed as mean ± SD based on triplicate values (p < 0.05). ND = Not Detected.