Large Cluster Ions Desorbed from Organic Salts under Particle Bombardment

D. N. Heller, Catherine Fenselau, James Yergey, R. J. Cotter, David Larkin

Research output: Contribution to journalArticlepeer-review


The sizes and Intensities of cluster Ions formed by fast atom bombardment from a series of organic salts In nearly saturated solutions have been evaluated. Clusters Involving as many as 29 anions and 30 cations have been recorded for cesium perfluorohexanesulfonate. The average mass of this n = 29 cluster Is 15 561.1. Abundances of the cluster Ions are found to vary as a function of salt concentration In the liquid matrix and the number of Ion pairs In the clusters. The abundance of the organic salt cluster [formula-omitted] at m/z 10 240.4 was found to be 8 times greater than the abu-dance of the Cs40I39 cluster at m/z 10265.5. The relatively high abundances of the sulfonate clusters permit them to be analyzed by using unit resolution In the high-mass range (for example at m/z 8110.5) and suggest that they may be useful as mass-marking reference compounds.

Original languageEnglish (US)
Pages (from-to)2274-2277
Number of pages4
JournalAnalytical Chemistry
Issue number13
StatePublished - Nov 1984

ASJC Scopus subject areas

  • Analytical Chemistry


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