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Table 2 The main absorption peaks in FT-IR spectra of rosin reagent and Samp and their proposed assignments [19, 20]

From: A multi-analytical approach for the identification of the natural resin from the Ming tomb in Shaanxi, China

Rosin reagent/cm−1 Samp/cm−1 Band assignment
3438 (b) 3438 (b) v OH
3080 (w) 3076 (w) vas =C–H
2958, 2867 (vs) 2955, 2868 (vs) vas CH3, vs CH3
2929, 2851 (vs) 2929, 2850 (vs) vas CH2, vs CH2
1695 (vs) 1695 (vs) v C=O
1639 (w) 1633 (w) v C=C
(nb) 1607, 1556, 1540, 1521, 1497 (w) γ ψ (vibration of aromatic ring skeleton)
1465 (m) 1465 (m) ρ CH2
1460 (m) 1460 (m) δas CH3
1385, 1365 (m-w) 1385, 1365 (m-w) δs CH3
1278, 1252, 1233 (m-w) 1276, 1252, 1233 (m-w) v C–OH in carboxylic acids
1188, 1179, 1152 (m) 1189, 1179, 1152 (m) v C–OH in carboxylic acids and 2° alcohols
1047, 1038 (w) 1047, 1038 (w) v C–OH in 1° and 3° alcohols
950 (m) 950 (m) γ O–H in carboxylic acids
890 (m) 886 (vw) γ =C–H in RR′C  =  CHR′′