Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
Search
Advanced search
OR
Browse
Search
Volume 42, Issue 6
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
REVIEW
  • Mass Spectrometry Using Fourier Transform
    Yasuhide NAITO, Masao INOUE
    1994 Volume 42 Issue 6 Pages 291-313
    Published: 1994
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.42.291
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR/MS) is one of the most successful examples of application of fast Fourier transform (FFT) technique to analytical methods. In this paper principle and features of FFT used in FT-ICR/MS are presented and various new techniques and recent development in signal processing and excitation of cyclotron motion of ions are introduced. The problem of non-linear effects in FT-ICR/MS is also discussed. They are caused by inhomogeneous electric and magnetic fields and ion-ion interaction.
    View full abstract
    Download PDF (1508K)
REGULAR PAPERS
  • Stable Carbon Isotope Measurement of Individual Fatty Acids Using Gas Chromatography/Isotope Ratio Monitoring Mass Spectrometry
    Hiroshi NARAOKA, Keita YAMADA, Ryoshi ISHIWATARI
    1994 Volume 42 Issue 6 Pages 315-323
    Published: 1994
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.42.315
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A gas chromatography/isotope ratio monitoring mass spectrometry (GC/IRMS) method was established for the determination of stable carbon isotopic compositions of individual saturated n-fatty acids ranging from C16 to C30. The fatty acids were derivatized to their methyl esters using BF3/methanol, and three n-alkanes were used as internal isotopic standard. Isotopic mass balance calculation indicated that the esterification caused no isotopic fractionation between the methyl ester moiety of fatty acid and methanol used. Therefore, isotopic correction was made by one additional carbon atom with the δ13C value of methanol. Analytical accuracy (deviation of the corrected δ13C values determined by GC/IRMS from those determined by a conventional method) and precision (standard deviation) were satisfactory for 90 to 360 ng of individual standard fatty acids examined. The accuracy was ±0.3‰ for average of several analyses, and the precision within 0.3‰. This method was applied to the δ13C determination of n-fatty acids ranging from C20 to C30 in a marine sediment.
    View full abstract
    Download PDF (641K)
  • Mass Spectra of Bis-Amide Pyrrolidine Alkaloids
    Naoto SENDA, Hisamasa WAKAYAMA, Tomoyuki FUJITA, Tomomi BANDO, Kenichi ...
    1994 Volume 42 Issue 6 Pages 325-331
    Published: 1994
    Released on J-STAGE: July 20, 2007
    DOIhttps://doi.org/10.5702/massspec.42.325
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    It is known that several kinds of pyrrolidine alkaloids with a bis-amide structure are isolated from extracts from leaves and roots of Meliaceae family plants. A fragment ion m/z 85 was found in common in mass spectra of all these compounds. The structure and fragmentation mechanism of the ion were elucidated through high-resolution mass spectra and B/E as well as B2/E linked scan spectra. The fragment ion was also found useful as an index for searching compounds having similar structures.
    View full abstract
    Download PDF (310K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top