Introduction for Amines testinJ!:
The
gas
chromatographic analysis crtcw level amines, in particular polyamines
and
ethanolamines,
is
considered
to
be one of
the
most cha1.Ienging. Without a properly
deactivated chromatographic pathway, severe peak tailing
and adsorption
can occur,
thereby
mining quantitative results. Inlet
liners
with the
same
four diffeIent
surface as
the
semivolatile
study
were evaluated with a low
level (2.5-5.0
ng
on column) test
mix
with various amine compounds
to
determine
each
surfaces' petfonnance.
Compounds
of
particular
interest
were
diethylenetriamine
and
diethanolamine,
as these are
compounds representative
of
the
most
diflicult basic compounds
to
be analyzed
by
gas
cMomatognlphy.
The
inlet liner
geography
to be
used
for
amine testing will be a single gooseneck. The
injection
mode
will
be
splitless. Since
the
samples
will
be injected at
low
ppm
levels,
a
liner which prevents interaction
between
the
sample
and
metal injection port
surfaces
will
allow
the isolation ofliner
performance,
The
bottom
funnel (gooseneck:) of the
liner
will
prevent
this interaction
so the
variation of resultant
data
is
reflective of the
various liner surface composition.
Each
liner
was
injected 6 times with
the
test
mix.
Data
analysis
will
compare
results
with
and
without
the
initial
injection in
order
to
determine the degree
ofpriming
required
by
each
surface.
Test conditions
are
shown
in the protocol
listing:
"'~O
_ _
'.Y~·_ """" _AN I-~- '-
___ ECH.....I ...
""y ..._
- --
_
_ _ ,
"
0- .
_ .
... " ....
. . ...__
