Answers are grounded in this paper and cite their sources.
The new technique of fast atom bombardment mass spectrometry has been applied to the investigation of a series of penicillins as free acids or as alkali metal salts. In all cases both positive and negative ion pseudomolecular species are observed giving molecular weight information. Additionally, significant fragmentation is observed in both the positive and negative ion spectra, which gives considerable structural information.
No takes yet. Share an insight, caveat, or question.
Barber et al. (1982) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: