3
Performing Injectors Routine Maintenance
Maintaining a Programmable Temperature Vaporizing Injector with Backflush (PTVBKF)
Thermo Scientific
TRACE 1300 and TRACE 1310 Hardware Manual
129
• Cleaning or replacing the PTVBKF liner
Check the liner for contaminants, debris, breakage and proper installation. The liner
must be replaced depending on the number of injections performed, and the
characteristics of the samples injected. Typical symptoms will indicate that the liner must
be replaced. The most common is the appearance of tailing peaks in the chromatogram,
particularly for polar compounds.
See
“Cleaning or Replacing the PTVBKF Glass Liner”
When replacing or removing a glass liner, it might break inside the injector. In this case
the broken parts of the liner must be removed from the injector, including the glass
splinters that might fall into the lower part of the vaporization chamber.
See
“Replacing the PTVBKF Broken Liner”
.
• Replacing the PTVBKF active carbon filters on the carrier gas line and split line
The active carbon filters must be replaced depending on the volume of solvent injected in
the time.
See
Replacing the PTVBKF Carrier and Split Lines Filters
on
Before maintaining the injector, read the following warning:
Tip
It is good practice to replace the septum every time the liner is replaced.
WARNING
The injector fittings could be hot. Carry out all operations at low temperature
to avoid burns. Therefore, before beginning the sequence, the injector must be cooled to
room temperature.
CAUTION
When handling organic solvents you must take precautions to avoid health
hazards.
Materials needed to maintain a PTVBKF injector
Septum
Tweezers
Glass liner
Liner seal (O-ring)
Ultrasonic cleaner
Mixture 1:1 methanol/acetone
Carrier gas line and/or split gas line active carbon filters
5.5 x25 mm slotted stubby driver
Silver seal
.
