From: Microscopic observations of paper and parchment: the archaeology of small objects
Wavenumber [cm−1] | Group vibration | Compound responsible for vibration |
---|---|---|
3726; 3700 | Free OH stretching | Inorganic compound (iron clay) |
3409 | OH bonded | Parchment, saponins, castor oil |
2925, 2856 | CH3, CH2 stretching | Parchment, saponins, castor oil |
1718 | C=O stretching | Saponins |
1664 | Amide I β sheet | Parchment |
1636 | Amide I α sheet | Parchment |
1556 | NH bend coupled with CN stretching | Parchment |
1444, 1407, 1382 | Scissoring of, O–C–H, C–C–H, CH2, C–OH, CH2 wagging, bending C–H | Parchment, saponins, castor oil |
1328 | Amide III | Parchment |
1238 | NH bending Amide III, C(O)–O stretching | Parchment, castor oil |
1199 | C–H bending | Parchment |
1148 | OH bending | Parchment, saponins, castor oil |
1093, 1036 | C–O stretching | Parchment, saponins, castor oil |
674, 609, 535, 472 | Not attributed | Skeletal vibration and inorganic compound related to free OH stretching |