Mass Spectrometry

Quadrupole cleaning procedure for QE-HF

Hi all, Does anyone have a PDF or video detailing the procedure for cleaning the quadrupole of a QE-HF mass spec? Kindly share if you do. Thank you!

Failure to turn on Ion Gauge - Thermo Orbitrap elite - why?

The Ion Gauge is failing to turn on following a source clean and attempted tune. Can anyone help me understand why and how to clear the error?Thanks

lock mass in Q-exactive focus

Hi, We're using Q-exactive Focus. Mass accuracy exceeds 5 ppm within a minimum of 6 hours to a maximum of 2 days after full or mass calibration.So we used the lock mass function, setting the external standard compound injection for an initial slope o...

Different fragmentaion spectra for different adducts of the same compound

I am reviewing some data in Compound Discoverer and came across two features with the same retention time and I suspect that they are two adducts from the same compound, specifically an [M+H]+ adduct and an [M+NH4]+ adduct. I was reviewing the fragme...

Clean-up procedure for Orbitrap 240

Hi, I have an Orbitrap 240 which I will be using for both proteins and lipids. I wanted to see if you have any clean-up procedures after using lipids that will help keep away any possible contaminations while running proteins? Thanks for your help Ra...

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Help an ambitious and young chemical analyst to grow!

Dear Colleagues,I'm Matteo, a 21yo chemical analyst approaching mass spectrometry for the first time. My lab decided to supply me a TSQ8000 EVO, where I've to improve PAH, PCB,Phenols, OCP, HBCD ecc.I'd apprecciate your experience and sense of collab...