This experiment was a procedural blank to support the previous
experiment using a drilled solid sample, designated CB OD1.
It used the same parameters as the first step of the opportunistic
derivatization (OD) experiment with test ID 25386.
It took advantage of the presence of the derivatization
reagent, N-methyl-N-tert-butyldimethylsilyl-trifluoroacetamide
(MTBSTFA), which had been adsorbing onto the sample since it was
loaded into the pyrolysis cup several months previously. The
experiment was executed in two steps. In OD1, the oven was heated
to 250 deg C for removal of O2 from oxychlorine compounds. Gases
evolved at oven T up to 125 deg C were collected on the SAM
trap for later analysis by the GC. After OD1, the pyrolysis cup was
returned to the sample manipulation system for 48 hours to allow
MTBSTFA to readsorb onto the sample residue. In the second step, or
OD2, the oven was heated to 900 deg C and gas was collected on the
SAM trap for GC analysis throughout the entire temperature ramp.
The data products for this run are estimates of MTBSTFA-related
compounds that formed in a sample cup with previously pyrolyzed
material. 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.