Purged Packed Inlets - Agilent Technologies gc/ms series Maintenance Manual

Purged Packed Inlets

Packed column analysis is frequently done when high efficiency separations are not
needed or when gases are analyzed by gas-solid chromatography. Purged packed inlets
are simple in both design and use. Few parameters need to be set, and all carrier gas
flow flushes through the inlet into the column in the standard configuration.
Purged Packed Inlet Practices and Rationales
Parameter Selection/Setting
Inlet temperature BP of solvent +50°C
BP of major solute(s)
Insert type 1/8 in. stainless steel
1/4 in. stainless steel
530 µm
Liner Glass
Initial column temperature Temperature programming
Column type 1/8 in. packed stainless
1/4 in. packed glass
530 µm
Carrier gas flow 10-40 mL/min
10-60 mL/min
Rationale
Ensures flash vaporization
Use for neat samples
Use for stainless steel column
only
Inserts permit connection of
columns up to 1/4 in. OD
Use to lower activity
(replaceable)
Sharpens peaks and reduces run
time
Will not break
Better for polar or labile
compounds
Use with N carrier gas
2
Use with He or H
2
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Inlets
carrier gas
75