Table 1. Concentration of Hydroxyl (Aliphatic, Phenolic) and Carboxylic Groups (mmol/g_lignin) as Obtained from Quantitative ³¹P NMR Analysis; Number Average Molecular Weight (Mn) and Polydispersity Index (Đ) as Obtained from GPC Analysis; Reported Values Refer to Pristine (PL) and Oxidized (OL) Lignins.

	OH content (mmol/g)
sample	aliphatic (Aliph-OH)	phenolic (Ph-OH)	carboxylic (−COOH)	totala	Mn (g/mol)	Đ
PL	2.11	3.55	0.33	5.99	1810	2.3
OL	2.59	4.56	0.43	7.58	1460	1.9

^aAliph-OH, Ph-OH, and −COOH groups were considered.