An attempt to distinguish between the components of a mixture of isomeric fragment ions

György Bujtás, M. Hollósi, Zs. Majer

Research output: Contribution to journalArticle


The [C7H10NO3]+ ion in the normal mass spectrum of 2‐ethoxycarbonyl‐5‐oxo‐2‐pyrrolidinepropanoic acid was shown to correspond to a mixture of two isomeric structures. By decreasing the ionizing electron energy, the one containing a CH2CH2COOH group becomes dominant. The proportion of the concentrations of the two isomeric ions was calculated by comparing their daughter ion spectra (obtained by linked scan at constant B/E) with the analogous spectra of a derivative partially labelled by deuterium at the carboxyl and amide groups.

Original languageEnglish
Pages (from-to)677-681
Number of pages5
JournalOrganic Mass Spectrometry
Issue number10
Publication statusPublished - 1987


ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Instrumentation

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