Setting The Carrier Gas Flow Rate For The G1883/G1290 - Agilent Technologies G1289 Operating Manual

Running a Sample
Setting Conditions

Setting the Carrier Gas Flow Rate for the G1883/G1290

Set the carrier gas flow as follows:
1.
2.
3.
Caution
The added flow of the headspace sampler will cause the flow calculations of
the inlet to be incorrect. If your added flow and pressure exceed the limits of
the inlet, the GC may go "Not Ready."
80
Set the following GC parameters:
Inlet (Volatiles Interface or Split/Splitless)
Mode
Initial temperature
Pressure
Split ratio
Split flow
Gas saver
Gas type
Column
Mode
Initial flow
Initial pressure
Outlet pressure
Set the split flow to 4 ml/min. The GC total flow will read 11 ml/min.
With an electronic flow meter connected to the GC split vent, turn up the
headspace carrier gas flow until the flow rate out the split vent equals the
flow rate desired in the column. (Because the split ratio is 1:1, this flow
rate equals the column flow rate.) See Figure 14. Remove the flow meter.
Note that the GC and Headspace pressure readings should be similar.
Record the headspace pressure reading—you can use it to set up future
checkout runs.
Split
Per method
Per method
1:1 (G1290)
4 ml/min (G1290/G1883) at GC EPC
Per method
Per method
Per method
4.0 ml/min
Per method
Ambient (per detector)