Table 2.
Phenolic compounds identified in the active maritime pine sawdust extract obtained at 175 °C.
| Compounds | Retention Time (min) | λmax (nm) | (M − H)− | Concentration (mg g−1 of Extract) |
|---|---|---|---|---|
| Phenolic Acids/Aldehydes/Alcohols | ||||
| Protocatechuic acid | 1.8 | 260 | 153 | 0.25 (± 0.01) |
| Vanillic acid | 3.7 | 262 | 167 | 0.53 (± 0.06) |
| Caffeic acid | 3.8 | 325 | 179 | 0.15 (± 0.01) |
| Coniferyl alcohol | 4.6 | 264 | 179 | 4.89 (± 0.22) |
| Vanillin | 4.7 | 280 | 151 | 0.64 (± 0.01) |
| Ferulic acid | 5.1 | 325 | 193 | 0.35 (± 0.01) |
| Coniferyl aldehyde | 5.9 | 340 | 177 | 0.83 (± 0.01) |
| Unknown 1 | 10.6 | 253 | 329 | 1.90 (± 0.06) |
| Lignans | ||||
| Nortrachelogenin | 6.9 | 281 | 373 | 7.30 (± 0.25) |
| Pinoresinol 2 | 7.7 | 281 | 357 | 2.84 (± 0.29) |
| Flavonoids | ||||
| Pinobanksin 3 | 9.2 | 289 | 271 | 1.01 (± 0.01) |
| Pinocembrin | 11.8 | 289 | 255 | 0.41 (± 0.02) |
| Total | 21.09 (± 0.40) | |||
1 Quantified using coniferyl alcohol as standard. 2 Quantified using nortrachelogenin as standard. 3 Quantified using pinocembrin as standard. Standard deviation using three replicates in brackets.