Abstract
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 ⨿-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.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Ens, W.; Beavis, R.; Bolbach, G.; Main, D.; Schueler, B.; Standing, K. G. Nucl. Instrum. Meth. Phys. Res. 1986, A245, 146.
Conzemius, R. J.; Adduci, D.; Huang, L. Q.; Junk, G. A.; Houk, R. S. Int. J. Mass Spectrom. Ion Processes 1989, 90, 281.
Huang, L. Q.; Conzemius, R. J.; Junk, G. A.; Houk, R. S. Int. J. Mass Spectrom. Ion Processes 1989, 90, 85.
Hodnett, B. K. Catal. Rev.—Sci. Eng. 1985, 27, 373.
Centi, G.; Trifiro, F. Chim. Ind. 1986, 68, 74.
Centi, G.; Trifiro, F.; Ebner, J. R.; Franchetti, V. M. Chem. Rev. 1988, 88, 55.
Lashier, M. E.; Moser, T. P.; Schrader, G. L. In New Developments in Selective Oxidation, Trifiro, F.; Centi, G., Eds.; Elsevier: New York, 1990.
Bordes, E. Catal. Today 1987, 1, 499.
Moser, T. P.; Schrader, G. L. J. Catal. 1987, 104, 99.
Wenig, R. W.; Schrader, G. L. J. Catal. 1986, 92, 612.
Pepera, M. A.; Callahan, J. L.; Desmond, M. F.; Milberger, E. C.; Blum, R. R.; Bremer, N. J. J. Am. Chem. Soc. 1985, 107, 4883.
Huang, L. Q.; Conzemius, R. J.; Junk, G. A.; Houk, R. S. Anal. Chem. 1988, 60, 1490.
Huang, L. Q.; Conzemius, R. J.; Holland, G. E.; Houk, R. S. Anal. Chem. 1988, 60, 1636.
Moser, T. P.; Schrader, G. L. J. Catal. 1986, 92, 216.
Schoer, J. K. M.S. Dissertation, Iowa State University, Ames, Iowa, 1988.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Schoer, J.K., Houk, R.S., Conzemius, R.J. et al. Ion association by time-of-flight mass spectrometry: a study of V-P-O catalysts. J Am Soc Mass Spectrom 1, 129–137 (1990). https://doi.org/10.1016/1044-0305(90)85048-Q
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1016/1044-0305(90)85048-Q