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Ver.1.36
3.3 SETTING UP GC INJECTION PORT
3.3.1 Replacing septum nut of GC injection port
The GC specific installation kit includes a septum nut for the GC injection port, a needle guide, and
heat sink that is attached to the pyrolyzer.
The septum attached to your GC is replaced with the one in the kit. The heat sink is secured to the
pyrolyzer interface. The bottom end of the heat sink is designed to fit into the septum nut. These
parts need to be properly installed in order to uniformly transfer heat to the septum. This minimizes
low temperature valleys in the flow path that sample passes through.
3.3.2 Replacing septum
It is recommended that the septum contained in the installation kit be used. This septum has a thin
coating on the surface in order to minimize adhesion to metal surfaces at high temperatures. Then
finger-tighten the septum cap at the GC injector. The coating facilitates the removal of the septum
when it is replaced.
3.3.3 About Injection port liner
Any injector liner recommended by your GC manufacturer can be used. When using the pyrolyzer,
the sample is vaporized in the pyrolyzer furnace, therefore, there is no impact with regards to mixing
efficiency and the associated discrimination that occurs in conventional split injection ports.
3.4 SETTING UP PYROLYZER FURNACE
3.4.1 Installing quartz pyrolysis tube to pyrolyzer
Be sure to use the supplied quartz pyrolysis tube (part No. PY1-3018A). The tubes (PY1-2018A)
used for the preceding models such as PY-2020iD/iS cannot be used for this pyrolyzer because they
are different lengths.
3.4.2 Attaching interface union and needle
Ensure that you use the supplied interface union and needle. The ones for PY-2020iD/iS may be
attached, but are not suited for this pyrolyzer.
The supplied graphite Vespel ferrule (part No. PY1-7911) that attaches to the quartz pyrolysis tube
should be used. 100% graphite ferrules (PY1-7921) may be used, but with lower sealing capability
and replacement can be troublesome.
3.4.3 Mounting pyrolyzer on GC
Insert the ITF needle at the bottom of the pyrolyzer to the GC injector by carefully lowering the
pyrolyzer while holding it in the upright position until the heat sink hits the septum nut. At this point,
make sure that the heat sink makes a good contact with the septum nut. Also, while lowering the
pyrolyzer, engage the screws on the both sides of the pyrolyzer to the slots of the pyrolyzer stand
which seats on the GC, then secure it by tightening the screws with the supplied hexagonal
screwdriver (2 mm). Use a level to ensure that the pyrolyzer is level.
