Agilent Technologies 8890 User Manual

15 Inlets
Operation Manual 209
About the Split/Splitless Inlet
This inlet is used for split, splitless, pulsed splitless, or pulsed split analyses. You can choose
the operating mode from the inlet parameter list. The split mode is generally used for major
component analyses, while the splitless mode is used for trace analyses. The pulsed splitless
and pulsed split modes are used for the same type of analyses as split or splitless, but allow
you to inject larger samples. Sleep mode is used for creating sleep methods, or if all gas needs
to flow onto the column.
Selecting the correct S/SL inlet liner
Split liner
A good liner for split mode operation will offer very little restriction to the split flow path
between the bottom of the liner and the inlet gold seal and between the outside of the liner and
the inside of the injection port body. The preferred Agilent split liner, part number 5183-4647,
incorporates a glass positioning bead on the bottom to facilitate this. It also has glass wool
inside the liner that provides for complete sample vaporization across the boiling point range
of the sample. Select an appropriate liner from Table 26.
Splitless liner
The liner volume must contain the solvent vapor. The liner should be deactivated to minimize
sample breakdown during the splitless time. Solvent vapor volume can be reduced by using
Pulsed Splitless mode. Use the Vapor Volume Calculator to determine vapor volume
requirements.
Vapor volume < 300 µL Use 2 mm liner (250 µL volume), 5181-8818 or similar.
Vapor volume 225 – 300 µL Consider pulsed splitless mode to reduce vapor volume.
Vapor volume > 300 µL Use 4 mm liner, 5062-3587 or similar.
Vapor volume > 800 µL Consider pulsed splitless mode to reduce vapor volume.
For thermally labile or reactive samples, use G1544-80700 (open top) or G1544-80730 (top
taper) liners.
Table 26 Split mode liners
Liner Description Volume Mode Deactivated Part Number
Low Pressure Drop –
Positioning Bead
870 µL Split – Fast
Injection
Yes 5183-4647
4mm ID, Glass Wool 990 µL Split – Fast
Injection
No 19251-60540
Low Pressure Drop,
Glass Wool
870 µL Split Yes 5190-2295

Agilent Technologies 8890 Specifications

General

Brand	Agilent Technologies
Model	8890
Category	Laboratory Equipment
Language	English