Preventive Maintenance

Split/splitless capillary inlets

Leaks

For proper inlet operation, it is essential the entire system be leak•tight. The following procedure should be performed in initial checkout, or any time a leak is suspected.

1.Switch off detector!

2.Install an inlet plug (a paper clip or similar•gaugewire) in the same manner as a capillary column.

Figure 8-5

Capillary Inlet Plug Installed for Leak Test

3.Adjust the split•flowflow controller to about 60 ml/min.

4.Adjust or set the column head pressure to obtain a column pressure of 138 kPa (20 psi).

gold

INJ B PRES

2

0

ENTER

Set inlet B pressure to 20 psi.

 

 

 

5.Shut off septum purge or cap the septum purge vent with a suitable swagelok fitting. Verify that it is shut off with a soap film (bubble) flow meter.

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