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 37, Issue 4
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
REGULAR PAPERS
  • Fragmentations of 1, 2-Diethoxyethane by Electron Impact
    Tamae Yanagisawa, Seiji Tobita, Susumu Tajima, Masaaki Yoshifuji, Naok ...
    1989 Volume 37 Issue 4 Pages 229-238
    Published: 1989
    Released on J-STAGE: May 01, 2007
    DOIhttps://doi.org/10.5702/massspec.37.229
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The fragmentation processes of 1, 2-diethoxyethane have been investigated by using deuterium labelling experiments, mass analyzed ion kinetic energy spectroscopy, and measurements of kinetic energy release and heats of formation.
    This molecular ion fragments to the ions at m/z 74, m/z 72, and m/z 59 by losses of C2H4O, C2H6O, and C3H7O, respectively, The first two reactions involve the hydrogen migration, These fragmentation mechanisms are estimated by comparison of the experimental results of the title compound with those of reference compounds.
    View full abstract
    Download PDF (554K)
  • Tandem Mass Spectrometric Study on Fragmentation in Fast Atom Bombardment Mass Spectra of Prenylated Flavonoids
    Mitsuo Takayama, Toshio Fukai, Taro Nomura, Kazutetsu Nojima
    1989 Volume 37 Issue 4 Pages 239-247
    Published: 1989
    Released on J-STAGE: May 01, 2007
    DOIhttps://doi.org/10.5702/massspec.37.239
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    It was directly proved that the molecular ion M+ produced under FAB condition results in an EI-like fragmentation, and the protonated molecule (M+H)+ a CI-like fragmentation, by using a four-sector tandem mass spectrometer. The result was confirmed by comparing the B2/E2 linked scan FAB (B2/E2 tandem FAB) mass spectra of three prenylated flavonoids with the corresponding B/E linked scan EI (B/E-EI) and B/E-CI mass spectra.
    View full abstract
    Download PDF (365K)
  • The Identification of Dyes of Greco-Roman Period Fabric in Egypt Using Liquid Chromatography/Mass Spectrometry
    Ryohei Yamaoka, Nobuko Shibayama, Takeshi Yamada, Masanori Sato
    1989 Volume 37 Issue 4 Pages 249-253
    Published: 1989
    Released on J-STAGE: May 01, 2007
    DOIhttps://doi.org/10.5702/massspec.37.249
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The red dyes of woven fabrics (I, II and III) from the Greco-Roman period, excavated at Akoris in middle Egypt, were investigated using UV-VIS absorption spectroscopy, HPLC and thermospray type liquid chromatography/mass spectrometry, selected ion monitoring (SIM) technique. UV-VIS spectrum and HPLC retention time of dyes of II and III suggested the presence of alizarin (MW 240), a natural dye from madder. Further analysis was made by LC/MS SIM using m/z 241 (MH+ ion of alizarin) as the selected ion. The presence of an ion m/z 241 peak at the identical retention time for authentic alizarin strongly suggests that fabrics II and III were dyed by madder. Fabric I, however, was not dyed by this herb, but by an unidentified weakly polar pigment.
    View full abstract
    Download PDF (218K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top