Analysis
of chocolate
flavour
through
gas
sensor
arrays
has
been
carried
out.
Two
different
set
of
sensors
have
been
tested
to
assess
the
performance
of
the
different
sensor
arrays:
metallo
porphyrins
and
gold
nanoparticles
peptide
coated
quartz
crystal
microbalances.
Two
series
of chocolate
samples
containing
differently
formulated
products
(dark,
white
and
milk)
have
been
tested:
the
former
made
of
samples
obtained
under
standard
process
conditions,
the
second
including
samples
added
with
some
volatile
compounds
associated
to
degradation
processes
and/or
low
quality
raw
materials
to
obtain
artificially
off-flavoured
samples.
Analysis
with
both
gas
sensor
arrays
resulted
in
a
good
discrimination
between
standard
and
artificially
off
flavoured
chocolate
samples.
The
best
performance
was
obtained
using
the
gold
nanoparticles
peptide
sensors
with
over
90%
of
correctly
assigned
samples.