Agilent Technologies 8890 User Manual

15 Inlets
218 Operation Manual
About the VI split mode
When you introduce a sample in the split mode, a small amount of the sample enters the
column while the major portion exits from the split vent. The ratio of split flow to column flow
is controlled by the user. The split mode is primarily used for high concentration samples when
you can afford to lose most of the sample out the split vent and for samples that cannot be
diluted.
Split ratio
Because of the interface’s small internal volume, the maximum total flow to the interface is
100 mL/min. This maximum flow puts some restriction on the split ratio you can set.
Setpoint dependencies
Some setpoints are interdependent. If you change one setpoint, other setpoints may change to
compensate. With a defined capillary column, setting column flow or linear velocity will set the
inlet pressure.
Split range Depends on column flow
Typically no split to 100:1
Temperature range 10 °C above ambient (with oven at ambient)
to 400 °C
Recommended temperature:  transfer line temperature of the external
sampling device
Table 33 Maximum split ratios
Column diameter
(mm)
Column flow 
(mL/min)
Maximum split
ratio
Total f low
(mL/min)
0.20 1 100:1 100
0.53 5 20:1 100
Table 34 Setpoint dependencies
When you change These setpoints change
Column defined Column not defined
Pressure Column flow*
Split flow
Total flow
No changes
Column flow
*
Pressure
Split flow
Total flow
not available
Table 32 Specifications of the volatiles interface (continued)
Specification Value/Comment

Agilent Technologies 8890 Specifications

General

Brand	Agilent Technologies
Model	8890
Category	Laboratory Equipment
Language	English