Re: ppm in XCMS centWave
Reply #2 –
Thank you so much for the reply! And thank you for all the tutorials on your page! It's very helpful for a newcomer to this field.
Here is a slide from a tutorial by Workflow4Metabolomics. Seems for Q-TOF instruments, the ppm is set to be ~10 times of actually accuracy, but not for Orbitrap. I also see others using ppm=2.5 for Orbitrap, so I was just wondering why?