Varian 450-GC, User Manual

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Injectors – 1177 Split/Splitless Capillary Injector
Page: 156 User Manual 450-GC Varian, Inc.
1177 Injector Screen
The 1177 Injector screen allows modifying the Injector parameters.
With the Enable checkbox it is possible to enable/disable the Injector
temperature control.
In the Temperature box the wanted Injector temperature can be set.
The Split State controls the flow of carrier gas through the Injector during the
analytical run. When the Split State is unchecked, most of the sample injected
is directed onto the column. When the Split State is checked, the sample is split
in the Injector with typically the smaller fraction entering the column and the
larger fraction being vented.
In the example below is a splitless injection. The Injector is held in the split state
for the initial period with split ratio of 20. When the run is started the split state
will switched Off. After 0.9 minute the split is switched on again.