Table 4.

Assignments of the Lignin ¹³C Signals in the Spectra of the dioxane lignin.

	ppm	Assignment	Amount (Per Ar)
			REF	110	130	150
1	153.18	C-3, S etherified	1.71	1.05	1.02	0.91
2	148.05	C-3/5, S non-etherified; C-4, G etherified	1.21	1.27	1.27	1.28
3	134.88	C-1/4, S/G etherified	1.47	1.32	1.35	1.44
4	114.2	C-3/5, H etherified	0.23	0.40	0.39	0.40
5	109.61	C-2, G	0.43	0.42	0.42	0.42
6	105.7	C-5/6, G etherified; C-2/6, S etherified	0.79	0.58	0.57	0.66
7	88.16	C-α, phenylcoumarans	0.21	0.13	0.13	0.12
8	85.02	C-β, β-O-4	0.56	0.33	0.35	0.36
9	75.15	C-a, β-O-4	0.31	0.22	0.24	0.27
10	72.28	C-γ, pinoresinols	0.39	0.22	0.21	0.25
11	60.83	C-γ in β-O-4	0.67	0.45	0.43	0.58
12	56	methoxyl groups OCH3	2.53	1.49	1.41	1.65