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This test uses gas chromatography/mass spectroscopy (GC/MS)
to provide information on the detailed composition of
gasoline.
This test is also referred to as
PIANO (Paraffin,
Isoparaffin, Aromatic, Napthene, and Olefin).
The
results of this test are used to distinguish between a
gasoline that has been manufactured by different refinery
processes. This test can also detect changes in a gasoline
due to a refinery modifying it's refining processes. The
data generated by this analysis is also useful in
determining the presence of multiple gasoline releases. The
results can provide numerical information on the presence of
gasoline constituents, including n-butane and
isooctane, which can be useful in determining the extent of
degradation the material present in the samples has
undergone, and, in some cases, the date at which the
gasoline was released.
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