Table 3: Measured and estimated H : C ratios and oxygen contents.

SampleH : C RatioOxygen content (% weight)
MeasuredaPredicted MeasuredaPredicted

WCO 31.821.8510.510.3
WCO 41.861.8510.510.6
WCO 51.861.8510.510.6
WCO 61.861.8510.510.3

aUncertainties in the measured H : C ratio and oxygen content are 0.02 and 0.1%, respectively.