HP 5890 Series II Plus Reference Manual page 28

Columns and Fittings
Inlet inserts
The split insert contains packing material (10% OV•1on 80/100 High
Performance Chromosorb•W),held in place by silanized glass wool plugs,
located immediately above a mixing chamber. This ensures proper
volatilization and homogeneous mixing of the sample prior to its entry
into the column.
Exercise care! The oven, and/or inlet, or detector fittings may be hot
WARNING
enough to cause burns.
If operating in split mode, carrier gas pressure must be reduced before
Caution
opening the inlet. If not done, pressure may blow insert packing out of
the inlet, altering its characteristics. Pressure is reduced at the
backpressure regulator for the inlet.
1. In handling the insert, avoid contaminating its surface (particularly
its interior).
2. Remove the insert retainer nut. The septum retainer nut need not be
removed from the insert retainer nut assembly.
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