Table 1.

Relative contents of elements and carbon species.

Sample	RT (min)	CT (min)	Relative Content (%) *
			C	O	C–C/C=C	C–O–C	O–C=C	R–OH or C–O–C
Lignin	-	-	59.4	40.6	71.3	7.8	12.8	8.1
LCF–Cu20–40	20	40	67.1	32.9	74.8	12.8	12.4	-
LCF–Cu120–40	120	40	68.9	31.1	82.2	5.9	11.9	-
LCF–Cu120–300	120	300	88.0	12.0	84.3	12.0	3.7	-

* Relative % carbon species content = $\frac{{\mathrm{A}}_{\mathrm{carbon}}}{{\mathrm{A}}_{\mathrm{total}\mathrm{carbon}}}\times 100\%$, where A_carbon is the peak area of the specific carbon species, A_{total carbon} is the total peak area of carbon species.