Table 3.
Content of phenolic acids in the examined plant extracts (expressed in mg/100 g dry sample a).
| Plant | Gallic Acid | Gentisic Acid | Caffeic Acid | p-Coumaric Acid | Vanillic Acid | Syringic Acid | Ferulic Acid | p-Hydroxybenzoic Acid |
|---|---|---|---|---|---|---|---|---|
| Origanum dictamnus (A) | 4.9 ± 0.03 | ND | 13.5 ± 0.02 | 13.9 ± 0.04 | 18.5 ± 0.02 | ND | 16.9 ± 0.04 | ND |
| Eucalyptus globules (B) | ND | ND | 8.1 ± 0.01 | 6.6 ± 0.02 | ND | ND | 12.3 ± 0.03 | ND |
| Sideritis cretica (C) | 1.1 ± 0.02 | ND | 3.3 ± 0.02 | ND | ND | ND | 6.8 ± 0.02 | 2.5 ± 0.01 |
| Origanum vulgare (D) | ND | ND | 6.4 ± 0.02 | ND | ND | ND | 10.4 ± 0.03 | ND |
| Phlomis cretica (E) | ND | ND | 2.2 ± 0.01 | ND | ND | ND | 5.1 ± 0.02 | ND |
| Phlomis lanata (F) | 14 ± 0.02 | 3.2 ± 0.03 | 20 ± 0.03 | 4.1 ± 0.02 | 2 ± 0.02 | 1.1 ± 0.02 | ND | 1.5 ± 0.01 |
| Nepeta melissifolia (G) | 20 ± 0.02 | 4.3 ± 0.03 | 26 ± 0.03 | 5.2 ± 0.02 | 2.7 ± 0.02 | 2.6 ± 0.02 | 22.4 ± 0.03 | 5.4 ± 0.01 |
| Mentha pulegium (H) | ND | ND | 13.5 ± 0.02 | ND | 13.5 ± 0.02 | ND | 13.5 ± 0.02 | ND |
a Results are expressed as mean (mg/100 g dry sample ± standard deviation) of three extractions and triplicate assays; ND = not detected.