Journal of the Mass Spectrometry Society of Japan
Online ISSN : 1880-4225
Print ISSN : 1340-8097
ISSN-L : 1340-8097
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Volume 58, Issue 3
Displaying 1-4 of 4 articles from this issue
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REVIEW
  • Fundamentals of Mass Spectrometry
    —Gas Phase Ion/Molecule Reactions—
    Kenzo HIRAOKA
    2010 Volume 58 Issue 3 Pages 93-110
    Published: June 01, 2010
    Released on J-STAGE: June 30, 2010
    DOIhttps://doi.org/10.5702/massspec.58.93
    JOURNAL FREE ACCESS
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    The ionization is the first step for the mass spectrometry. The ion/molecule reactions play major roles not only in the gas-phase chemical ionization but also in the ionization processes in condensed phases, e.g., secondary ion mass spectrometry (SIMS), matrix-assisted laser desorption/ionization (MALDI), electrospray ionization (ESI), field desorption (FD), and field ionization (FI). In general, the mass spectra obtained by various ionization methods reflect the outcome of complex ion/molecule reactions taking place in the respective ionization method. Thus, fundamental knowledge on the ion/molecule reactions is indispensable to make the mass spectrometry as the superb analytical technique. In this chapter, the fundamentals of ion/molecule reactions will be described.
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COMMENTARY
  • Detectors for Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometer
    Koichi TANAKA, Ken-ichi YOSHINO, Masahiro HAYASHI, Yasuhide NAITO, Mas ...
    2010 Volume 58 Issue 3 Pages 111-116
    Published: June 01, 2010
    Released on J-STAGE: June 30, 2010
    DOIhttps://doi.org/10.5702/massspec.58.111
    JOURNAL FREE ACCESS
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    In general, microchannel plate (MCP) is used as the detector for time-of-flight mass spectrometer (TOF-MS). In addition to the MCP, TOF-MS equipped with modified secondary electron multiplier (SEM) is commercially available. A superconducting tunnel junction (STJ) detector, which enables measurement of kinetic energy in addition to time-of-flight, has been developed for TOF-MS. MCP and SEM detectors give only m/z values, which remains ambiguous over charge number (z). Since kinetic energy is proportional to z, TOF-MS equipped with STJ detector is possible to determine mass (m) unambiguously. In this commentary, the features of MCP and modified SEM will be described. Furthermore, we give an outline of the STJ detector.
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Letter to the Editor
Message from the President
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