Ptv Inlet Solvent Vent Mode - Agilent Technologies 7890 Series Advanced Operation Manual

PTV inlet solvent vent mode

Advanced Operation Manual
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 or 100 µL syringe with variable
plunger speed—slowly, 5 to 30 seconds.
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.
The figure shows the flows with the septum head. Flows
with the septumless head are the same except that the
septum purge flow bypasses the head.
"Pre Run and Prep Run"
3
Inlets
on page 40)
109