The
analysis
of
the
volatile
compounds
is a
main
chal-
lenge
in the
food
field
for
the
evaluation
of their
quality,
their
freshness,
and
even
to control
the
packaging
material
[11,12].
Gas-chromatography
and
mass
spectrometry
fingerprints
matched
with
proper
pattern
recognition
algorithms
are
used
to detect
and
identify
specific
problems.
Fingerprints
can
be also
obtained
with
arrays
of
chemical
sensors.
When
complemented
by
a
multivariate
data
analysis
technique,
such
as
those
used
in