Table 2.

Semi-quantitative comparison of phenolic and aliphatic hydroxyl groups after demethylation based on ¹H-NMR analysis of acetylated lignins.

	Proton Arrangement
	Chemical Shift (ppm)	8.38	8.10	6.95	3.82	2.27	2.03
Acetylated AL	Molar Amount of Functional Groups in 1 g Lignin (mmol/g)	7.02		6.38	1.54	0.52	0.37
Acetylated HI-DL		7.02		5.34	1.10	0.67	0.47
Acetylated HBr-DL		7.02		6.11	1.18	0.64	0.47