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 58, Issue 6
Displaying 1-4 of 4 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
REGULAR PAPERS
  • Gas Chromatography/Mass Spectrometry of the Lignans in Resin of Callitris preissii
    Shuichi YAMAMOTO, Robert E. COX, Bernd R. T. SIMONEIT
    2010 Volume 58 Issue 6 Pages 195-209
    Published: December 01, 2010
    Released on J-STAGE: December 15, 2010
    DOIhttps://doi.org/10.5702/massspec.58.195
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The total extract of resin from Callitris preissii was analyzed by gas chromatography/mass spectrometry and 34 lignans, underivatized and as trimethylsilyl ether derivatives, were identified by interpretation of the mass spectra. The lignans in the resin include 13 new lignans, i.e., four secoisolariciresinol derivatives, four lariciresinol derivatives, 3′,4′-methylenedioxy-7′-hydroxylariciresinol, 3,4-methylenedioxypinoresinol isomer, and two matairesinol derivatives. Furthermore, 17 lignans of the resin are characterized by methylenedioxy substitution on either or both guaiacylpropyl units or the syringylpropyl unit: i.e., five secoisolariciresinol derivatives, three lariciresinol derivatives, 3′,4′-methylenedioxy-7′-hydroxylariciresinol, three pinoresinol derivatives, and five matairesinol derivatives, have methylenedioxy structures. Eleven lignans, including two secoisolariciresinol derivatives, four lariciresinol derivatives, two pinoresinol derivatives, and three matairesinol derivatives, contain a syringyl moiety.
    View full abstract
    Download PDF (886K)
  • Quantitative Aspects of Atmospheric-Pressure Penning Ionization
    Hiroko FURUYA, Shizuka KAMBARA, Kentarou NISHIDATE, Susumu FUJIMAKI, Y ...
    2010 Volume 58 Issue 6 Pages 211-213
    Published: December 01, 2010
    Released on J-STAGE: December 15, 2010
    DOIhttps://doi.org/10.5702/massspec.58.211
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Quantitative aspects related to atmospheric-pressure Penning ionization (APPeI) were examined by analyzing C6D6 in C6H6 using C6H6 as an internal standard. A linear relation was found in log-log plots between [C6D6+]/[C6H6+] and the amounts of C6D6 detected were in the range from 1.6×10-10 g to 1.6×10-4 g for C6D6 spiked in 0.4 μL C6H6, with a correlation coefficient of 0.995. The limit of detection for C6D6 was approximately tens of pg. In He and Ar APPeI, a major reagent for Penning ionization would be the rare gas (Rg) excimers Rg2*.
    View full abstract
    Download PDF (195K)
  • Development of a Remote-from-Plasma Dielectric Barrier Discharge Ion Source and Its Application to Explosives
    Kenzo HIRAOKA, Lee chuin CHEN, Takashi IWAMA, Mridul kanti MANDAL, Sat ...
    2010 Volume 58 Issue 6 Pages 215-220
    Published: December 01, 2010
    Released on J-STAGE: December 15, 2010
    DOIhttps://doi.org/10.5702/massspec.58.215
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The design of a new type of dielectric barrier discharge (DBD) ion source for ambient ionization is described. In this ion source, the DBD plasma is confined in the DBD tube so that the sample gases can be ionized just outside of the discharge tube by DBD excited helium gas without being exposed to the plasma jet. The findings indicate that the ion source is capable of the soft and high-sensitive ionization of explosives.
    View full abstract
    Download PDF (343K)
  • Influence of Crystalline Forms of Titania on Desorption/Ionization Efficiency in Titania-Based Surface-Assisted Laser Desorption/Ionization Mass Spectrometry
    Hideya KAWASAKI, Kouji OKUMURA, Ryuichi ARAKAWA
    2010 Volume 58 Issue 6 Pages 221-228
    Published: December 01, 2010
    Released on J-STAGE: December 15, 2010
    DOIhttps://doi.org/10.5702/massspec.58.221
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In surface-assisted laser desorption/ionization mass spectrometry using titania (TiO2) films (TiO2-SALDI-MS), one of the most important aspects is the absence of matrix interferences in the low-mass region. Therefore, in TiO2-SALDI, the detectable mass range for small biomolecules, pharmaceutical compounds, amino acids, and oligopeptides can be extended to below m/z 500. The physicochemical properties of titania are dependent on the crystalline form of the material; however, thus far, very little attention has been given to the effect of the crystalline form of titania on titania-based SALDI-MS. We investigated the influence of crystalline forms on the desorption/ionization efficiency of TiO2-based SALDI-MS using different crystalline forms such as rutile, anatase, and a non-crystalline amorphous structure. On the basis of survival yield measurements using benzylpyridium chloride, and the desorption/ionization efficiency of peptides (angiotensin II and gly-gly-tyr-arg) and saccharides (cellobiose and hexa-N-acetyl-chitohexaose), it was found that the anatase-type TiO2 is suitable for the TiO2-based SALDI-MS. Rutile-type TiO2 lost the SALDI activity compared with TiO2 in other crystalline forms, although rutile-type TiO2 showed the highest UV absorbance.
    View full abstract
    Download PDF (500K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top