Introduction for Semivolatile testing
US EPAmethod 8270 is
a
comprehensive list of compounds varying from
basic
to
neutral
to
acidic
character.
The variety of compound funct:ionalities is
also highly variable, which 1hercforc makes 1hc 8270
listing
an excellent test
bed
for
chromatographic systemperformance.
The inlet liner
geography
to
be used for semivolatile
testing
will
be
a drilled
Uniliner. 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 of liner
performance only. The
bottom
ofthe drilled Uniliner physically
seals
against
1he head of1he analytical column 1herehy forcing 1he sample to interact only
with the liner surfaces.
Each liner was injected with 6 dilutions ofthe
test mix:
4. 10. 16.24.32. and
80ng on column
for
each component. Test conditions are
shown
in
the
protocol
listing:
"'~O
_ _
'.Y~·_ """" _AN I-~- '-
___ ECH.....I ...
""y ..._
- --
_
_ _ ,
"
0- .
_ .
... " ....
. . ...__
