Band number Wavenumber (cm-1) Assignment References
1 3695 Clay minerals 1, 4
2 3626 Clay minerals, Phenols O – H***** 1, 4, 8
3 3300 O-H Vibration, Cellulose O-H, N-H 2, 6
4 2927 Aliphatic C-H Vibration, Lipids C-H**** 5, 7, 8
5 2855 Alkenes 4
6 1730 Vibration of C = O in unconjugated ketones and free aldehydes, hemicellulose 6
7 1630 Vibration of aromatic C = C ***, Nitrogenous compounds, Proteins (Amide I, II) C = O; C = N; N-H 2, 7
8 1608 Vibration of aromatic rings C = C ***, Lignin 2, 6, 9
9 1516, 1510 Vibration of aromatic C = C ***, Lignin 6, 8
10 1414 CH2, C-OH vibration 2
11 1378 Vibration of C-H 6,7
12 1240 Vibration of C-O, C-O Carbohydrates *, Amide III (Protein) and C-N Nucleic Acids, PO2 ** 4, 7, 8
13 1157 Asymmetric C – O – C vibration, C-O * carbohydrates, cellulose, and hemicellulose 6, 7, 8
14 1118 C-O vibration of polysaccharides or polysaccharides as substances, C-O Carbohydrates * 3, 7, 8
15 909 Minerals, Carbohydrates C-O * 1, 7, 8
16 890 Minerals 1