This experiment was performed as a procedural blank, but it involved
reheating the residual sample from the previous run, the drilled solid
sample experiment designated CB6.
The sample for this experiment was loaded into a pre-heated cup to
reduce the amount of products of the derivatization reagent,
N-methyl-N-tert-butyldimethylsilyl-trifluoroacetamide (MTBSTFA), that
could adsorb onto the sample. For estimation of abundances of volatile
compounds detected in EGA, the background was subtracted as a constant
value, either at the start or end of the run or before major peaks.
An exception to this was CO2, which was modeled with a downward-
trending background throughout the run.
Uncertainties in abundances, deriving from statistical noise,
background subtraction, calibration factors, assumptions regarding
ionization cross-sections for the relevant compounds, and isobaric
interferences, are estimated at 10-20% of the values.