Inlets 3
Advanced Operation Manual 61
Cold split introduction
For cold split sample introduction, use an initial inlet
temperature below the normal boiling point of the solvent. If
the liner volume is enough to hold all the vaporized solvent,
start the first inlet temperature ramp at 0.1 minutes with a
high heating rate (500 °C/min or higher). The final
temperature should be high enough to volatilize the heaviest
analytes from the liner and should be held for at least
5 minutes. A final temperature of 350 °C for 5 minutes has
proven sufficient to quantitatively transfer C
44
.
For larger injection volumes or to eliminate the solvent, hold
the initial temperature long enough to vent the solvent
through the split vent and then begin the first ramp. Use a
fast rate for thermally stable analytes. Slower rates may help
minimize thermal degradation in the inlet.
Split
Carrier supply
80 PSI
Septum Purge
Valve
Frit
EPC Module
PS
Inlet Weldment
Column
Split Vent Trap
FS = Flow Sensor
PS = Pressure Sensor
Valve Valve
Frit
PS
FS
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