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 62, Issue 6
Displaying 1-8 of 8 articles from this issue
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Historical Perspectives of Mass Spectrometry in Japan
REVIEW
  • Advances in Isotope Ratio Analysis by ICP-MS and Its Application to Environmental Geochemistry
    Takeshi OHNO
    2014 Volume 62 Issue 6 Pages 103-113
    Published: December 01, 2014
    Released on J-STAGE: December 15, 2014
    DOIhttps://doi.org/10.5702/massspec.14-58
    JOURNAL FREE ACCESS
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    Mass spectrometry utilizing atmospheric pressure inductively coupled plasma (ICP) as an ion source has been applied for elemental and isotopic analyses in various geochemical samples. The ICP is characterized by high ionization efficiency for almost all elements. Over the last decade, the multiple collector-ICP-mass spectrometry (MC-ICP-MS) has been widely used for isotope analyses. The precision of isotopic ratios achieved by the MC-ICP-MS technique is comparable to that of the thermal ionization mass spectrometry (TIMS) technique. Recently, a triple quadrupole ICP-MS (ICP-MS/MS) has been applied to the measurements of isotope ratios at an ultra-low level. The ICP-MS/MS features an additional quadrupole mass filter, situated in front of the octopole reaction cell and quadrupole mass filter, which allows only the analyte ion to enter the cell by rejecting all other ions. In this paper, I review recent outstanding studies on isotope geochemistry achieved by MC-ICP-MS and ICP-MS/MS techniques.
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COMMENTARY
  • Usage of the Term MS/MS Spectrum
    Ken-ichi YOSHINO
    2014 Volume 62 Issue 6 Pages 115-118
    Published: December 01, 2014
    Released on J-STAGE: December 15, 2014
    DOIhttps://doi.org/10.5702/massspec.14-61
    JOURNAL FREE ACCESS
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    The “Definitions of terms relating to mass spectrometry [IUPAC (International Union of Pure and Applied Chemistry) recommendations 2013]” define the term “MS/MS spectrum” as “a mass spectrum obtained using tandem mass spectrometry.” The semantic content of the term “MS/MS spectrum” is not only a product ion mass spectrum but also a precursor ion spectrum and a neutral loss spectrum. However, the term “MS/MS spectrum” is frequently used as a synonym of a product ion spectrum. An “MS/MS spectrum of the peptide angiotensin I” does not convey the same meaning as the “product ion spectrum of the peptide angiotensin I.”
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Letter to the Editor
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