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 16, Issue 2
Displaying 1-8 of 8 articles from this issue
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  • Secular Variation of Cosmic-ray Intensity
    KUNIHIKO KIGOSHI
    1968 Volume 16 Issue 2 Pages 73-81
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.73
    JOURNAL FREE ACCESS
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  • The Study of Pyrolytic Products of Polymer Materials by Mass Spectrometry V
    Mass Spectrometry of Pyrolytic Products of Polyamide(6Nylon)and Polyvinyl Acetate
    KINJI HIRAMATUS
    1968 Volume 16 Issue 2 Pages 83-91
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.83
    JOURNAL FREE ACCESS
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    Mass spectrometric quantitative analysis on the gaseous and volatile products formed by pyrolysis of polyamide(6nylon)and polyvinyl acetate in a vessel containing the calibrated amounts of air at various temperatures was studied. The pyrolytic products were hydrogen, carbon monoxide, carbon dioxide, methanoi, ethanol, acetone, methyl ethyl ketone, dimethyl furan, methyl furan, acetic acid, acetaldehyde, methane, acetylene, ethylene, ethane, propane, propylene, butene, butane, benzene, toluene and others. Similar experiments were also carried out for the polyamide synthetic fiber, and the main components of the gaseous and volatile products formed by pyrolysis were identified. From the results of these works, mass spectrometry seems to be an effective method for the analysis of the pyrolysis product of polyamide and polyvinyl acetate.
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  • Mass Spectrometric Isotope Analysis of Plutonium in Neutron Irradiated Uranium Dioxide
    KIYOSHI INOUE, TADAO KOBAYASHI, AKIRA DOI
    1968 Volume 16 Issue 2 Pages 93-100
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.93
    JOURNAL FREE ACCESS
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    The discussion was made on Pu analysis for the UO2 specimen, which was irradiated to about 8, 000 MWD/T of burnup in a nuclear reactro. Mass spectrometer was equipped with a thermal ionization double-filament source assembly for the purpose of Pu analysis. Although there are an uncertainty, the variation of the ratio of Pu to U indicates a general trend of making maximum value with the semple filament temperature.
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  • Improvement of the Radio-Frequency Mass Spectrometer by the Use of Square Wave R. F. Voltage
    F Kanematsu, T Shino, I Matsuda, H Yamashita
    1968 Volume 16 Issue 2 Pages 101-112
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.101
    JOURNAL FREE ACCESS
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    The radio-frequency mass spectrometer, being designed to operate with square wave voltage, showed remarkably improved resolving power. Some of these can also operate with sinusoidal r. f. voltage. Generalized resolving power equations were obtained and were compared with the experimental results.
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  • Isotopic Anomalies of Xenon from Tellurium minerals
    N Takaoka, K Ogata
    1968 Volume 16 Issue 2 Pages 113-154
    Published: June 15, 1968
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.16.113
    JOURNAL FREE ACCESS
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    Xenon extracted from old tellurium minerals were analyzed with a high-sensitivity mass spectrometer. Old tellurium minerals of different four localities were used in the experiments, that is, tetradymite(Bi2 Te2S)from the Oya mine, tellurobismuthite(Bi2 Te3)from the Suwa mine, tellurium mineral(AgAuTe+Te)from the Rendai-ji mine and native tellurium(Te)from the Teine mine. In heating the sample minerals, the temperature was raised stepwise typically by100°C and kept constant for a hour. Rare gases extracted at step of extraction temperature were purified and then sealed up in the respective ampoul. Large excesses in129Xe, 130Xe and131Xe extracted from the Oya tellurium mineral and in130Xe from the Suwa tellurium mineral were found definitely. Their origins were discussed on the basis of the isotopic amonalies patterns as well as experimental and theoretical considerations on the nuclear reaction relating to the relevant isotopis of xenon. The130Xe-excess was attributed to doubleβ-decay of130Te. A mall excess in128Xe was interested in relation to double β-decay of128Te. Several nuclear processes which could contribute to128Xe were discussed on the available data. Concerning the isotopic amonalies in129Xe and131Xe, the ratio 129Xe-excess/130Xe-excess(m=129 and 131)seems to decrease and the ratio129Xe-excess/131Xe-excess seems to increase with the increasing tellurium concentration for the Oya tellurium minerals. We may be able to look for a solution of the amonalies in either the epithermal neutron captures on128Te and on130Te or both the(μ-, n)reaction of130Te and the themal neutron captures on128Te and on130Te, where the neutrons can be produced by the(μ-, n)reactions and the(α, n)recations on the environmental rocks. In order to understand the above results on the ratio between Xe-excess, we may have to take into account the competition process between between the neutron captures on128Te and on130Te and the neutron adsorptions by the associated impurities, and the(a, n)reactions on126Te and on128Te respectively.
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  • Mass Spectrometric Investigation of Petroleum(X).
    Mass Spectrometry of Nitrogen Compounds in Petroleum.
    TAKAO NISHISHITA, KINYA FUJII, SHOZO OSHIMA
    1968 Volume 16 Issue 2 Pages 155-159
    Published: June 15, 1968
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.5702/massspec1953.16.155
    JOURNAL FREE ACCESS
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    The authors applied mass spectrometry to estimate nitrogen compounds in Kuwait petroleum distillates(290 to 310°C). Nitrogen compounds were condensed from gas oil by Florisil liquid chromatography. Carbon number distribution of each compound types was measured by low voltage ionization method. The abundance order of the type of nitrogen compounds were as follows: CnH2n-5N(0.024%)CnH2n-7N(0.0075%)CnH2n-17N(0.0032%)CnH2n-oN(0.0017%)CnH2n-15N(0.0097%)CnH2n-11N(0.0070%)CnH2n-13N(0.0024%)Distribution of carbon number was existed from C10 to C21, and apex of distribution was shown from C13 to C16.
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  • [title in Japanese]
    SHIGERU YAMASHITA
    1968 Volume 16 Issue 2 Pages 161-165
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.161
    JOURNAL FREE ACCESS
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  • Organic Mass Spectrometry
    AKIRA TATEMATSU
    1968 Volume 16 Issue 2 Pages 167-186
    Published: June 15, 1968
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.16.167
    JOURNAL FREE ACCESS
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