Electrospray ionization mass spectrometric analysis of aqueous polysulfide solutions

Jenny Gun, Alexander D. Modestov, Alexey Kamyshny, Dan Ryzkov, Vitaly Gitis, Anatoly Goifman, Ovadia Lev*, Veit Hultsch, Thomas Grischek, Eckhard Worch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

The speciation of polysulfides in aqueous solutions was investigated by electrospray - ion trap and electrospray - time of flight mass spectrometry. The pH dependence of the observed total dissolved polysulfides' concentration followed the trend calculated based on reported thermodynamic constants. However, the observed species' distributions were substantially different from those calculated based on thermodynamic coefficients derived by UV spectroscopy. Notably, large abundances of heptasulfide, octasulfide and nonasulfide species were observed throughout the pH range 6 to 11. The large molecular weight anions had not been reported before in aqueous solutions although indirect evidence had suggested their existence.

Original languageAmerican English
Pages (from-to)229-237
Number of pages9
JournalMicrochimica Acta
Volume146
Issue number3-4
DOIs
StatePublished - Jun 2004

Keywords

  • CID
  • Collision-induced dissociation
  • ESI-MS
  • Hydropolysulfides
  • Polysulfides

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