GC-MS Tune 5975 - Air and Water Leak Check

Hi, 

What is the acceptable criteria for the Air and Water leak check on a GC-MS?

For 69, 18, and 28, I have a relative abundance of 100, 1.61, and 1.15. This seems really low. Can you please give me suggestions as to what I should do?

Thank you!

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  • Source was last cleaned on Sept 8 by an Agilent service engineer. Column has since been change. Do you think there is air in the column? Purity of carrier is 99.99% helium.

    Tune report should be at the following link. I have an older computer that doesn't have a PDF software.

  • Hi

    I did not get autotune report but you can go through below link to cross check ur autotune report.

    community.agilent.com/.../reviewing-the-autotune-report-for-agilent-5977-gc-msd-systems-in-ei-mode

  • Above one is in detail document of msd evaluation.

  • In your autotune report, can you check what is value of EM..

    By the way, i shared info herewith to compare / cross check..

  • Thank you. I am wondering if the problem is associated with air in the column/conditioning the column. The Hi-Vac also looks to be the problem.

  • Please attached autotune report..

  • Can you see it now? 

  • When source of MS was cleaned then that time any GC maintenance performed means consumables like septa/ liner/ gold seal etc were replaced or not

  • Not those consumables, but consumables in the source were replaced.

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