Mmi Solvent Vent Mode - Agilent Technologies 7890 Series Advanced Operation Manual

3
Inlets

MMI solvent vent mode

70
Enter the Purge time when you wish the split valve to
5
open.
Set Total flow greater than the column flow plus the
6
septum purge flow to guarantee adequate column flow.
Turn Gas saver on, if desired. Set the time after Purge time.
7
Press [Prep Run] (see
8
before manually injecting a sample. This is automatic if
an Agilent sampler is used.
This mode is typically used for large volume injections. For
single injection use a 50 to 500 µL syringe and the ALS
variable plunger speed to slowly inject the sample.
The sample is injected into a cold inlet. If conditions are
properly chosen and the sample is suitable, analytes deposit
in the inlet liner while the solvent evaporates and is swept
out. Large or multiple injections can be used to concentrate
sample in the inlet before transferring to the column for
analysis.
"Pre Run and Prep Run"
Advanced Operation Manual
on page 40)