Split line testing for Agilent 7890B GC

Kris 3 months ago

HI All,

I did a test as specified below to check if there is any issue with the Split Vent. There is a pressure build up when I closed the hole with my finger. Does that indicates the valve is broken and I need to call the Agilent to fix it?

Would this affect the RSD(%) of injections? I am having an issue with my injection repeatability.

Troubleshooting a Leak in a Split/Splitless Inlet - Articles - GC Portal - Agilent Community

Thank you

Regards

Kris

Top Replies

Kris 1 month ago +1

Hi Paulsalverda, thank you for your reply. The issue with high RSD has been resolved with the completion of annual GC maintenance by Agilent. The actual root cause was not identified.

0 paulsalverda 3 months ago

Please upload the acqmeth.txt file that is underneath the instrument run method subdirectory. There are many parameters that can affect reproducibility. What sample type? What solvent? How much are you injecting? What method of injection? and more....
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0 Kris 1 month ago

Hi Paulsalverda, thank you for your reply. The issue with high RSD has been resolved with the completion of annual GC maintenance by Agilent. The actual root cause was not identified.
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