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  • 1980-1984  (2)
  • 1980  (2)
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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 7 (1980), S. 109-114 
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electron impact mass spectra of various methoxyhalobiphenyls have been reinvestigated. Previous findings, concerning the effect of the methoxy group upon the main fragmentation routes, have been confirmed and extended. In addition, studies of unimolecular and collision induced fragmentations of ions, using linked scan techniques, have been made. Such an approach permits the identification of substances with a minimal chromatographic separation prior to mass spectrometry. It has also led to some clarification of the fragmentation pathways leading to the observed cracking patterns.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1980), S. 445-453 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The unimolecular and collision induced fragmentation reactions of 19 polycyclic aromatic hydrocarbons have been investigated, using B/E linked scans, accelerating voltage scans, and measurements of appearance energies. From the point of view of simple analytical fingerprinting within isomeric series, B/E linked scans without collision gas offered the best compromise. Attempts to correlate trends observed in fragmentation intensities with various molecular parameters were generally unsuccessful, although some tentative conclusions have been drawn. The evidence concerning fragmentation mechanisms and ion structures is also discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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