This experiment was a blank run of the drilled solid sample 
experiment sequence.
It revealed the continued presence of products of the derivatization
reagent, N-methyl-N-tert-butyldimethylsilyl-trifluoroacetamide
(MTBSTFA), adsorbed 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. Abundances are
reported only for gases evolving during the pyrolysis ramp and not
the preheat, in keeping with data for EGA runs. Thus there are no 
abundances reported for H2O or HCl, even though they were present
in the preheat. Uncertainties in abundances, deriving from statistical 
noise, background subtraction,calibration factors, assumptions 
regarding ionization cross-sections for the relevant compounds, and 
isobaric interferences, are generally estimated at 10-20% of the 
values.