Inlets 3
Advanced Operation Manual 105
Cold splitless introduction
For cold splitless introduction, use an initial inlet
temperature below the normal boiling point of the solvent.
For most solvents, starting the first inlet temperature ramp
at 0.1 minutes provides good transfer and reproducibility. A
program rate of 500 °C/min or higher is appropriate for
thermally stable analytes. A final temperature of 350 °C,
held for 5 minutes, has quantitatively transferred up to C
44
alkane.
A main advantage of temperature programmability is that
the inlet can be heated gently to transfer delicate analytes. If
the oven temperature is initially low enough to refocus the
analytes on the column, the inlet heating rate can be made
slower (e.g., 120 °C/min). This reduces thermal degradation
from the inlet and can improve peak shape and quantitation.
Split vent flow
Purge flow
Saver flow
Inlet pressure
Inlet is
pressure
controlled
Post pressure
Inlet pressure
Inlet
temperature
Final temp 1
Initial temperature
Prep
Run
Start
Run
Purge
Time
Saver
Time
Stop
Run
Post
Time
Post
Time
Stop
Run
Purge
Time
Purge
Time
Prep
Run
Prep
Run
Start
Run
Start
Run
Column mode = Constant flow
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