Both electron impact (EI) and fast atom bombardment (liquid secondary ion mass spectrometry) (FAB(LS1MS)) spectra of the antibypertensive drug nipradilol (3,4-dihydro-&(2-hydroxy-3-isopropylamino)propoxy-~nitroxy-ZH-1-benzopyran) and it analogues exhibit intense [M -44]+ peaks. However, high-resolut
Differences in the keto–enol equilibrium of [M + H]+ ions of bupropion formed by electron impact and fast atom bombardment ionization
✍ Scribed by Robert L. Johnson; Lester C. E. Taylor
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 385 KB
- Volume
- 28
- Category
- Article
- ISSN
- 1076-5174
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✦ Synopsis
Abstract
The fragmentation of the protonated molecular ion of bupropion produced by collisionally induced decomposition is shown to depend on the ionization method used to form the [M + H]^+^ ion. The daughter ion products do not depend on the energy of decomposition, i.e. high‐ or low‐energy collisions, but on the ratio of the keto‐enol equilibrium as influenced by the ionization process.
📜 SIMILAR VOLUMES
Four-sector tandem mass spectra of the molecular and quasi-molecular ions of the cyclic depsipeptide valinomycin (RMM 1110.6) were compared. Electron impact (EI), chemical ionization (CI), fast atom bombardment (FAB), field desorption (FD) and electrospray ionization were used to create M", (M + HI'