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Problem with "Search Using NIST MS program"

Question asked by tny on Nov 13, 2019
Latest reply on Nov 20, 2019 by tny

I am using Agilent MassHunter Qualitative Analysis B.07.00 and NIST MS Search 2.2. I try to identify the peaks using NIST library. This is the mass spectrum of a peak of interest:

But when I tried to do NIST search, a completely different spectrum appeared in NIST, but with the right retention time showing as the title of the spectrum:

If I click the next scan of the same peak, I got the same mass spectrum as the previous scan:

But when I did NIST search, another completely different spectrum appeared:

Neither of the NIST search resutls gave me the right identification of that peak.

 

How can I solved the problem? How can I get the correct spectrum pass to NIST MS Search?

 

Thank you in advance!

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