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4-SECTOR TANDEM MASS-SPECTROMETRY - A COMPARISON OF THE MOLECULAR AND QUASI-MOLECULAR IONS OF THE CYCLIC DEPSIPEPTIDE VALINOMYCIN FORMED USING ELECTRON-IMPACT, CHEMICAL IONIZATION, FAST-ATOM-BOMBARDMENT, FIELD DESORPTION AND ELECTROSPRAY IONIZATION
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UNSPECIFIED (1992) 4-SECTOR TANDEM MASS-SPECTROMETRY - A COMPARISON OF THE MOLECULAR AND QUASI-MOLECULAR IONS OF THE CYCLIC DEPSIPEPTIDE VALINOMYCIN FORMED USING ELECTRON-IMPACT, CHEMICAL IONIZATION, FAST-ATOM-BOMBARDMENT, FIELD DESORPTION AND ELECTROSPRAY IONIZATION. ORGANIC MASS SPECTROMETRY, 27 (4). pp. 502-507. ISSN 0030-493X.
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Abstract
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 + H]+, [M + Na]+ and [M + K]+ ions from valinomycin. Large differences were found between the FD and FAB tandem mass spectra of [M + Na] + ions, and between the FD and EI tandem mass spectra of M+. ions. Differences between the spectra are ascribed to the formation of ions having the same mass but different structures. FAB tandem mass spectra of [M + Na]+ and [M + K]+ ions show greater degrees of fragmentation than do the FAB tandem mass spectra of [M + H]+ ions.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | ORGANIC MASS SPECTROMETRY | ||||
Publisher: | JOHN WILEY & SONS LTD | ||||
ISSN: | 0030-493X | ||||
Official Date: | April 1992 | ||||
Dates: |
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Volume: | 27 | ||||
Number: | 4 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 502-507 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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