This experiment was a drilled solid sample experiment, designated
MA_DER. It used the derivatization reagent, N-methyl-N-tert-
butyldimethylsilyl-trifluoroacetamide (MTBSTFA). The "EGA" products
contain estimates of the abundances of MTBSTFA products for
comparison with MA1 and MA2 EGA experiments. For estimation of
abundances of volatile compounds detected in the EGA data, the
background was subtracted as a constant value, either at the
start or end of the run or before major peaks. 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 20% of the values.