Table 3.
Assignment of the infrared bands to functional groups in wood

Bond Type	Peak (cm-1)	Remark
-OH stretching	3339.50
C-H vibration	2917.12	Surface wax
C=O stretching	1735.34	Carbonyis
C-H stretching	1425.07	Lignin
C-H bending	1370.84	Hemicellulose
O-H phenolic	1235.88
C-C stretching	1031	Carbohydrate