Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 173

PTV Troubleshooting
Symptom
Discrimination of
heavy compounds in
splitless mode
Discrimination of
volatile compounds in
splitless mode
Discrimination of
volatile compounds in
solvent split mode
Maintenance and Troubleshooting Manual
Table 9-3. PTV Troubleshooting Table (Continued)
Diagnosis
Liner not suitable for the
actual sample
Quartz wool causing
excessive retention of high
molecular compounds
Initial temperature too high
Liner diameter too small
Volatiles are eliminated
through the purge line
Initial temperature too high
Injection and evaporation
time are set as to exceed the
time required for the solvent
elimination
Split flow set too high
Lack of an adequate quartz
wool packing inside the liner
Maintaining a PTV Injector
Remedy
Replace the liner with an adequate one.
A lower diameter liner would improve
the sample transfer. Refer to
Replace the Liner Operating Sequence
on page 151.
Replace the packed liner with a new one
filled will quartz wool.
Replace the packed liner with an empty
one.
Refer to Clean or Replace the Liner
Operating Sequence on page 151.
Set Inject temp to a lower value.
Replace the liner with one of larger
diameter. Refer to Clean or Replace the
Liner Operating Sequence on page 151.
Set Const purge flow? to N, then
set Stop purge for to a value
corresponding to Splitless time
Set Inject temp to a lower value.
Set Inject time and
Evaporation time to adequate
values.
Set Split flow to a lower value.
Insert quartz wool in the liner.
Chapter 9
Clean or
173