70 Advanced Operation Manual
3 Inlets
5
Enter the Purge time when you wish the split valve to
open.
6 Set To tal f low greater than the column flow plus the
septum purge flow to guarantee adequate column flow.
7 Turn Gas saver on, if desired. Set the time after Purge time.
8 Press [Prep Run] (see “Pre Run and Prep Run” on page 40)
before manually injecting a sample. This is automatic if
an Agilent sampler is used.
MMI solvent vent mode
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.
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