Table 4.

MIR vibrational mode regions identified from regression coefficient plots and spectral assignments corresponding to lignin and/or lignin monomers

Vibrational mode from regression coefficients plot	S/G/H vibrational mode and spectral assignment
788-790	784 (G) [37]
808-836	813 (G) [37]
	827 (S) [38]
854-883	863, 878 (G) [37]
912-917	914 (G) [37]
1137-1168	1142 (G) [39]
	1151 (G) [40]
1205-1263	1215 (Lignin) [40]
	1226 (G), 1252 [39]
1270-1299	1270 (G) [39]
	1269 (G) [40]
1319-1425	1425 (S) [38]
	1330, 1425 (S), 1379, 1428 (Lignin) [39]
	1327 (G), 1425, 1427 [40]
1442-1502	1500 (S) [38]
	1465 (Lignin) [39]
	1462, 1463 [40]
1508-1521	1506-1513 [39]
	1513, 1514 [40]
1585-1606	1589 (S) [38]
	1596–1600 (Lignin) [39]
	1594, 1603 [40]
1610-1612	1610 [41]
1698-1714	1704 [40]
1745-1756	1733-1753 [42]

G = guaiacyl, S = syringyl.