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 14, Issue 2
Displaying 1-5 of 5 articles from this issue
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  • Mattauch-Herzog Type Mass Spectrograph with Two-Stage Electrostatic Field
    ISAO TAKESHITA
    1966 Volume 14 Issue 2 Pages 59-71
    Published: June 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.59
    JOURNAL FREE ACCESS
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    An earlier work on a Mattauch-Herzog type mass spectrograph with two-stage electrostatic field is extended to investigating the conditions of simultaneous elimination of αβ aberration for all masses. The design parameters are numerically calculated. The other coefficients of the second-order aberrations are examined and the total image defects are calculated for typical examples. An instrument according to the present study has sufficiently small and approximately constant image defects and has a high potential for use in the chemical analysis of solid.
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  • Mass spectrometer systems for the isotope geochemistry II Precision measurement of the isotope ratio of volatile elements
    HITOSHI SAKAI
    1966 Volume 14 Issue 2 Pages 71-77
    Published: June 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.71
    JOURNAL FREE ACCESS
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    A mass spectrometer system for the precise comparison of the isotope ratio of sulfur, carbon and oxygen is described. The results of 34;S/32S ratio measurements indicate the reproducibility is better than ±0.2per mil in terms of δ34S scale. δ34Stroilite of a standard sulfur of the Canadian group was found by our system to be+11.2per mil, comparing+10.8per mil, the average given by the group.
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  • Mass spectrometer systems for the isotope geochemistry II Precision measurement of the isotope ratio of volatile elements
    HITOSHI SAKAI
    1966 Volume 14 Issue 2 Pages 72-77
    Published: June 01, 1966
    Released on J-STAGE: February 13, 2012
    DOIhttps://doi.org/10.5702/massspec1953.14.72
    JOURNAL FREE ACCESS
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    A mass spectrometer system for the precise comparison of the isotope ratio of sulfur, carbon and oxygen is described. The results of 34S/32S ratio measurements indicate the reproducibility is better than ±0.2per mil in terms of δ34S scale. δ34Stroilite of a standard sulfur of the Canadian group was found by our system to be +11.2 per mil, comparing +10.8 per mil, the average given by the group.
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  • A High Resolution Mass Spectrometer With Multi-stage Fields
    HISASHI MATSUDA
    1966 Volume 14 Issue 2 Pages 78-81
    Published: June 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.78
    JOURNAL FREE ACCESS
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    A mass spectrometer which may have very large mass dispersion and resolving power is proposed. Consider the tandem combination of n cylindrical electrostatic analyzers of sector type (opposite deflections to each other) with the same ae, Φe, and magnification X(<1)each, and the tandem combination of n homogeneous magnetic analyzers of sector type (opposite deflections to each other) with the same am, Φm and magnification 1/X each. These two groups of the fields are connected in tandem so that the deflection in the final electric field and that in the first magnetic field are in the same sense. The double focusing condition is satisfied if ae=am=a. The total magnification of the image is 1, while the mass dispersion at the final image is given as follows:
    Dm=a/2(1+1/X)(1+1/X+1/X2;+…+1/Xn-1)γ.
    If X is very small and n large, then very large mass dispersion and resolving power may be expected. For example, in the case X=1/3, n=3, ae=am=100 cm, Φe=63°39′, Φm=90°, mass dispersion of 2600 γ cm and resolving power of 26, 000, 000/sμ are expected.
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  • The Mass Spectra of Flavonoids
    SHIN-ICHI SASAKI, YASUHIRO ITAGAKI, TADASHI KUROKAWA, EIJI WATANABE, T ...
    1966 Volume 14 Issue 2 Pages 82-92
    Published: June 01, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.14.82
    JOURNAL FREE ACCESS
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    The fragmentation of flavonoids by electron impact has been studied and the following results described: 1) Chalcones gave the usual fragmentation pattern; however, 2′-hydroxychalcones showed complex spectra according to the isomerization of chalcone to flavanone. 2) The fragmentation pathways of flavones were decided by comparison with many kinds of halogen-substituted flavones. 3) Isoflavone gave the M-1ion as the base peak, and no loss of CO was observed. 4) Some natural flavanones-desmethoxymatteucinol and sakuranetin derivatives-were also measured. The mass spectra were consistent with their structures.
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