Michael Pfeffer

2 Questions 4 Answers 0 Followers

Questions related from Michael Pfeffer

What are typical Cu sources causing Cu adducts in ESI MS?

Hi everybody, currently I observe quite frequently Cu-adducts on my ESI high resolution MS, especially when analyzing ligands. There was no Cu used for the synthesis, so it must come from the...

22 October 2020 5,731 5 View

Why is the monoisotopic peak sometimes slightly different to the calculated m/z?

Hi, I just had a look on a recent analysis (on C26H19F4N2O4Se+) and was wondering why the simulated monoisotopic peak of the molecular ion (579.0441) is slightly differnt to the calculated m/z...

27 March 2019 7,846 12 View