Thermo Scientific TRACE 1300, Руководство по оборудованию

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3
Performing Injectors Routine Maintenance
Maintaining a Programmable Temperature Vaporizing Injector (PTV)
Thermo Scientific TRACE 1300 and TRACE 1310 Hardware Manual 119
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 PTV Glass Liner” on page 121 .
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 PTV Broken Liner” on page 123 .
• Replacing the 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 PTV Carrier and Split Lines Filters” on page 125 .
Before maintaining the injector, read the following warning:
Tip
It is good practice to replace the septum every time you replace the gas liner.
WARNING The injector fittings could be hot. Carry out all the operation 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
hazard.
Materials needed to maintain a PTV 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 x 25 mm slotted stubby driver
Silver seal