Post run Macro/Command for cleaning GC-Inlet - MSD ChemStation

I'm sure there is a way. not sure how.

But what you can do is a "dummy" injection with a low volatile solvent for a 5 minute run. Have the 5 minute run at 300 degrees with flow at 1 mL/min as a separate method. So sequencing you can:

1) run normal sample - method A

2) "post-run" run low volatile solvent - method B (300 degrees, 1 mL/min for 5 minutes- maybe high oven temp just to clear the column)

3) run normal sample - method A etc...

I'm sure there is a way. not sure how.

But what you can do is a "dummy" injection with a low volatile solvent for a 5 minute run. Have the 5 minute run at 300 degrees with flow at 1 mL/min as a separate method. So sequencing you can:

1) run normal sample - method A

2) "post-run" run low volatile solvent - method B (300 degrees, 1 mL/min for 5 minutes- maybe high oven temp just to clear the column)

3) run normal sample - method A etc...

Hello gchalpain,

apologies for the late reply. Thanks for your suggestion.

Your method is of course sensible and good. However, I thought of an elegant macro method.
Nevertheless many thanks.

Metthews2

Hi Matthew,

Quick question, do you need the solvent injection? And can you just have the inlet at 300 degrees anyway? Inlet is only their to vaporise a sample and introduce it to the column.

Reason why I ask is you can set up the post run to do what you ask in the method settings:

First image is the post-run time and temperature of the oven, second is the flow rate through the column.

Just trying to think of non-macrorelated ways to do what you ask.