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Features of the 1079 Injector
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The 1079 can be operated isothermally or temperature programmed.
The temperature range of the injector is from -99 to 450 °C. Sub-
ambient temperatures are achieved using cryogenic cooling.
•
Changing from one injection mode to another typically involves a change
of injector insert and a modification to the injector program. Glass inserts
can be easily changed from the top of the injector.
•
Temperature programming in the splitless mode gives better recovery of
labile analytes and is useful for wide boiling point mixtures.
•
The injector temperature profile keeps the septum cool while maintaining
the point of injection closer to the setpoint temperature.
•
The 1079 injector design facilitates large volume injection (5 - 100 µL).
•
The 1079 uses positive septum purge to minimize the adsorption of
sample onto the injector septum and to prevent contaminants from the
septum entering the column.
Automatic Start Switch
The automatic start switch is a spring loaded actuator that fits over, and is
aligned with, the injection port of the 1079 universal injector nut. The GC run
is started when the actuator is depressed by the syringe barrel, or manually
pressed at the moment of sample injection. The GC run can also be
manually started by pressing START on the keyboard.
The injector nut and automatic start switch assembly may
be very hot during instrument operation and should not be
touched with unprotected hands.
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