Characterization of underivatized pterins by laser desorption fourier transform mass spectrometry

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    Abstract

    Laser desorption FfMS provides a powerful method for examining the structures of underivatized pteridines. (M + Na)+ and (M + K)+ ions are generated by laser desorption and can be used to determine molecular weights. The negative ion spectra provide more detailed structural information through an (M-H)- ion as well as a variety of fragment ions. The collisional dissociation spectra of these negative ions give detailed structural information which is determined by possible resonance structures for the specific ions. Deuterium exchange reactions were found to be quite useful to define fragmentation pathways.

    Original languageEnglish
    Pages (from-to)72-75
    Number of pages4
    JournalPteridines
    Volume4
    Issue number2
    DOIs
    StatePublished - May 1993

    Funding

    This research was supported by the Office of Health and Environmental Research, U.S. Department of Energy under contract DE-AC05-840R214 00 with Martin Marietta Energy Systems, Inc.

    Keywords

    • Laser desorptior
    • Mass spectrometry
    • Underivatized pterins

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