Mid and Near-Infrared Reflection Spectral Database of Natural Organic Materials in the Cultural Heritage Field

Table 3

Experimental wavenumber values corresponding to the maxima of the mid-IR total reflection mode bands of polysaccharide materials and their tentative assignment.

Experimental wavenumbers (cm^-1)		Band assignment
Cellulose	Arabic gum
3510	3560	OH
2985		CH3
2950	2950	CH2
2918	2900	CH3
2845		CH2
	1730	νC=O (esters)
1670	1665	C=O and HOH (intramolecular water)
	1620	C=O and HOH (intramolecular water)
1470	1445	δCH, νC-O and δCOH
1385	1380	δCH, νC-O and δCOH
1345		δCH, νC-O and δCOH
1320		δCH, νC-O and δCOH
	1265	δCH, νC-O and δCOH
1200		νC-O
1171	1171	νC-O
1144		νC-O
1100	1108	νC-O
958		CH