Table 3 Assignment of infrared bands
Wave numbers (cm−1) | Functional group | Corresponding component |
|---|---|---|
1736-1724 | ν (C=O) | Cellulose, hemicelluloses |
1660-1600 | δ (H–O–H) | Water |
1603-1594, 1510-1501 | δ (C=C) | Lignin, aromatic skeleton |
1456-1450, 1424-1417 | δ (C–H) | Lignin |
1370-1363 | δ (C–H) | Cellulose, hemicelluloses |
1352-1330 | γ (CH2), δ (O–H) | Lignin |
1318-1309 | ν (C–O–C) | Cellulose |
1270-1266 | ν (C=O) | Lignin, guaiacyl units |
1234-1226 | ν (C–O) | Cellulose, lignin |
1156-1150 | ν (C–O) | Lignin, xylan |
1115-1092 | ν (C–O–C) | Cellulose, hemicelluloses |
1059-1050 | ν (C–O) | Cellulose, hemicelluloses, lignin |
1034-1024 | ν (C–O) | Cellulose, hemicelluloses |
895-900 | δ (C–H) | Cellulose |