| Wavenumber (cm−1) | Assigned functional group | References |
| 897 | Glycosidic Linkage | Liu et al., 2016 |
| 1259 | C-O stretching in lignin and hemicellulose | Li et al., 2016 |
| 1373 | C-H deformation in cellulose and hemicellulose | Li et al., 2016; Li et al., 2010 |
| 1427 | -CH2 scissoring motion | Li et al., 2016 |
| 1450 | Lignin aromatic skeletal vibration | Yang et al., 2016 |
| 1505 | Lignin aromatic skeletal vibration | Lynam et al., 2016; Li et al., 2016; |
| 1595 | Lignin aromatic ring vibration+ C-H deformation | Yang et al., 2016 |
| 1638 | C=C aromatic skeletal vibration | - |
| 1732 | C=O unconjugated stretching of the hemicellulose acetyl | Li et al., 2016 |
| 2850; 2918 | CH2 symmetric stretching; CH asymmetric stretching | Colom et al., 2003 |