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The following are the gas purifiers available from Varian.
Purifier
Part Number
High capacity oxygen trap
03-949770-02
Indicating oxygen trap
88-501019-00
Combined hydrocarbon and moisture trap
03-949862-00
Indicating moisture trap
01-900007-00
Injector
Maintenance
The injector is the component of the Gas Chromatograph that requires the
most frequent maintenance. This is due to the fact that the sample is
deposited in the injector, thus leading to potential contamination and build up
of non volatile deposits. The most frequent injector maintenance is septum
replacement. In addition insert replacement and injector cleaning are very
common. As septum replacement is common to all liquid injectors on the
3800 this procedure is presented first, followed by specific maintenance
procedures for the individual injectors.
Septum
Replacement
The injector septum is an expendable part and must be replaced on a routine
basis. The frequency of replacement depends on the number of injections
and whether the injections are by hand or with an autosampler. In general the
septum should be replaced every 50 - 100 injections or when symptoms of a
septum leak are seen. These symptoms include changing retention times,
reduced detector response or a drop in column head pressure. The latter
symptom is not always valid as some injectors, such as the 1079, are
pressure controlled. With a pressure controlled injector, the column head
pressure will remain constant even if a leak is present.
