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Openlab 2.4 - GC Blank Run

chesstu

Hi

Using Openlab 2.4 with our 6890N GC.

 

My question is how to be able to capture a Blank Run (no injection, only FIDsignal during oven ramping) ?

 

In the training I understood that a "Double Blank" is what I needed.

But when I make a sequence, with first line as a "Double Blank" to only capture the FID signal during a run with no injection, there is still a volume injected.

I cannot put "0" in the injection volume, as we did with Openlab CDS EzChrom.

 

On top, I would like to know how to do that type of instrument blank using a the Single Injection tab.

There's no option for a "Double Blank" and we cannot put 0 as a volume.

 

We cannot make method with an injection volume of 0 either

 

I'm kinda stuck !

 

Thanks

 

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  • 0

    Hello chesstu,

     

    A double blank is not the same as an instrument blank. The distinction between a blank and a double blank is that a double blank does not include the internal standard while a blank does.

     

    In order to setup an instrument blank on a GC, you just need to select 'No Injection/Instrument Blank' as the Injection Source for the line in the sequence table or when submitting a single sample:

     

    You could also just remove the syringe from the ALS tower.

Reply
  • 0

    Hello chesstu,

     

    A double blank is not the same as an instrument blank. The distinction between a blank and a double blank is that a double blank does not include the internal standard while a blank does.

     

    In order to setup an instrument blank on a GC, you just need to select 'No Injection/Instrument Blank' as the Injection Source for the line in the sequence table or when submitting a single sample:

     

    You could also just remove the syringe from the ALS tower.

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