100 Advanced Operation Manual
3 Inlets
A single temperature ramp is enough for the injection
process. The remaining ramps may be used to clean the liner
or to reduce the inlet temperature in preparation for the
next injection.
Hot split introduction
For hot split introduction, set an initial temperature high
enough to volatilize the analytes. No additional thermal
parameters are required as the inlet will maintain the
setpoint throughout the run.
Because of the small liner volume (about 120 microliters),
the PTV has a limited injection capacity with hot split
introduction. Injection volumes exceeding 1 μL in the hot
split mode may overflow the inlet causing analytical
problems. Cold split introduction avoids this potential
problem.
Setting parameters for split mode operation
Mode: The current operating mode—split or pulsed split
Tempera ture Actual and setpoint inlet temperatures.
Initial temperature Starting temperature for the inlet.
Initial time Hold time at the inlet initial temperature.
Rate # Temperature program rates for inlet thermal ramps.
Final temp # Final inlet temperature for ramps 1, 2, and 3.
Final time # Hold time at Final temp 1, 2, and 3.
Pressure Actual and setpoint inlet pressure. Controls
capillary column flow and linear velocity.
Split ratio The ratio of split flow to column flow. Column
flow is set in the column parameter list. This line does not
appear if a column in the flow path is not defined.
Split flow Flow, in mL/min, from the split/purge vent. This
line does not appear if a column in the flow path is not
defined.
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