Ion association by time-of-flight mass spectrometry: a study of V-P-O catalysts

J. K. Schoer, R. S. Houk, R. J. Conzemius, G. L. Schrader

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The oxidation catalysts (VO2)P207 and β-VOPO4 are studied by laser desorption time-of flight mass spectrometry. Mass spectra of both positive and negative ions are reported for these compounds. Individual scans are tested for ion association, that is, the consistent appearance of a given pair of ions in many scans. The structurally simpler {amalgamation}-VOPO4 shows fewer associations than either (VO)2P207 or an 18O-substituted analogue of β-VOPO4 even though the overall spectra from the three compounds do not differ greatly. These results indicate that the associations observed between ions may be sensitive to small differences in structure in the original specimen. Thus, the identification of ion association may provide information to supplement the mass spectrum of the sample.

Original languageEnglish (US)
Pages (from-to)129-137
Number of pages9
JournalJournal of the American Society for Mass Spectrometry
Issue number2
StatePublished - Apr 1990
Externally publishedYes

ASJC Scopus subject areas

  • Structural Biology
  • Spectroscopy


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