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Photofragmentation Studies of Biomolecular Ions of Amino Acids Using a Tandem Reflectron Time-of-flight Mass Spectrometer

✍ Scribed by W. J. Jia; K. W. D. Ledingham; C. T. J. Scott; C. Kosmidis; R. P. Singhal

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 672 KB
Volume: 10
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(199610)10:13<1597::aid-rcm678>3.0.co;2-2

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✦ Synopsis

A tandem reflectron time-of-flight mass spectrometer developed in Glasgow University was used for the investigation of photofragmentation of the molecular ions of the amino acid derivatives: PTH-tryptophan, PTHvaline, and PTH-alanine as well as of cytosine and guanine. The molecular ions were generated by matrix-assisted laser desorptionhonization and the laser photofragmentation of selected ions took place at the turn-around point of ions in the reflectron. The fragmentation mass spectra of the molecular ions of these amino acid derivatives have been observed and possible fragmentation pathways are discussed.

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