Table 2.

Elemental Analysis of 160–50, 220–20, 160–120 and 220–120 samples.

Sample	C (wt.%)	H (wt.%)	O (wt.%, calculated)
160–50	37.81	4.25	57.94
160–120	40.12	3.87	56.01
220–20	45.33	3.81	50.86
220–120	68.85	4.74	26.41