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XCMS Online / ppm in XCMS centWave
The centWave paper says the following:
Quote
1. Mass deviation μ in ppm, typically set to a generous multiple of the mass accuracy of the mass spectrometer. We use μ = 30 ppm for the Bruker MicrOTOF-Q, which is advertised with a mass accuracy of 3–5 ppm.
But I see others use ppm=2.5, instead of 25, for Orbitrap with advertised mass accuracy < 5 ppm. Could anyone explain why?
Thanks!