Transfer method from 6890N to 7890B

Hi Janna, 

Do you have multiple compounds in your injection to compare using a relative response factor?  It is tough to compare two different systems on area response alone.  You don't mention a detector, but I think you may have an FID.

Are you using the same autosampler on both systems?  Same liners?  For best comparison, I would set the 7890B to a standard splitless injection, then evaluate new features once you are certain you have equivalent performance.  

Abbey

Injecting 0.2uL with a 10uL syringe is an incredibly small amount to expect any good consistency in my opinion but others can chime in.  What is the pulsed pressure pulsing to?  I would try a 10:1 split injection using 1uL injection. I would use an internal standard also.

Hi Abbey,

I am injection THF so its just one peak. Yes it is FID that i am using.

The autosampler on the 6890 is the 7683B and on the 7890  it is the 7693A.

I have used the same type of liner on  both GCs (Agilent part number 5062-3587).

Thanks

Janna

Hi,

Yes I was thinking the syringe volume is big but we have always used 10uL. I can order a smaller size and try that. I am stuck with splitless as that is what is in the test method so i can't change it.

Thanks

Janna