title: Multiple cationization of polyethylene glycols in field desorption mass spectrometry: a new approach to extend the mass scale on sector mass spectrometers
authors.affiliation: Institute of Mass Spectrometry, University of Amsterdam, Amsterdam, The Netherlands.
authors.initials: X
authors.lastname: Guo
authors.initials: RH
authors.lastname: Fokkens
authors.initials: HJ
authors.lastname: Peeters
authors.initials: NM
authors.lastname: Nibbering
authors.lastname: de Koster CG