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 13, Issue 29
Displaying 1-8 of 8 articles from this issue
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  • High Resolution Mass Spectrometer for Analysis of Organic Compounds.
    HITOSHI TSUYAMA, YASUO NAKAJIMA, TAKESHI KOIKE, TAMOTSU NODA, KOREICHI ...
    1965 Volume 13 Issue 29 Pages 1-10
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.1
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    A double focusing mass spectrometer was constructed for the organic structural analysis. The electrostatic sector was designed as an attachment of the Hitachi RMU-6D mass spectrometer system. The dimensions for the ion trajectory were chosen as follows: central radius and deflection angle of the magnetic field are am=20cm and φm=90° (symmetric), and those in the electrostatic field ae=25 cm and φe=45°(le′=41 cm and le″=20.6cm), respectively.
    Step voltages of 3600, 1800, 900 and 600V for ion accelaration were so established as to have respective mass ranges of M/e 1-300, 2-1200 and 6-1800. Four identical slit mechanisms were employed as the source(main slit), alpha, beta and collector slit apertures adjustable up to 1mm with a precision of several microns. A secondary electron multiplier with a gain of 104 was used to measure the ion currents.
    In order to minimize the catalytic decomposition of the sample materials, the main part of the sample inlet system was made of all glass and enclosed in a thermostatic oven heated up to 350°C.
    The C5H5N-13CC5H6 doublet with the mass difference of 8 mu at M/e 79 was separately recorded with a 15% valley when both peak heights were nearly equal, so that the resolving power of the instrument approachs to the theoretical value of M/ΔM 12, 500 when using 10 μ collectorslit.
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  • Mass Spectrometric Investigation of Petroleum(VIII).
    Type Analysis of Alkyl Groups on Alkylbenzenes in the Aromatic Fraction in the High Boiling Range Petroleum
    SHOZO OSHIMA, TAKAO NISHISHITA
    1965 Volume 13 Issue 29 Pages 11-16
    Published: September 01, 1965
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.13.11
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    Auther worked out the type analysis of alkylbenzenes in the aromatic fraction in the high boiling range petroleum. The amounts of primary, secondary and tertiary alkylbenzenes in the monosubstituted alkylbenzenes which have C3 and C4 alkyl group were individually determined.
    The method of calculation in quantitative type analysis of alkyl group is as follows: The mass number of β-cleavage ion of alkylbenzene is known from the following equation:
    m/e(β)=(B+14nQ)-(14k+1),
    where:m/e(β)=mass number of β-cleavage ion of alkylbenzenes;
    B=mass number of benzene ring;
    n=number of alkyl groups;
    Q=carbon number of alkyl group;
    k=constant related to the type of alkyl group and Q
    In case of the carbon number of alkyl group is three, the analytical values of primary and secondary alkylbenzenes are obtained by solving the two linear simultaneous equations concerned to the peak heights measured on the mass numbers derived from the above equation. The analytical values of primary, secondary and tertiary alkylbenzenes are similarly evaluated from the three linear simultaneous equations, when the carbon number of alkyl group is four. The number of alkyl groups on benzene ring and the carbon number of alkyl group are determined from the mass spectrometrically determined carbon number for the most abundant molecular ions.
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  • Certain Features regarding Photographic Plate Detection as used in the Mass Spectrometric Analysis of Organic Compounds.
    SHUNICHI ENOMOTO, EIJI WATANABE
    1965 Volume 13 Issue 29 Pages 17-24
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.17
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    In the mass spectrometric analysis of organic compounds, it is necessary to obtain high resolution mass spectra, high sensitivity, simultaneous detection of standards and samples in order to be able to measure the exact mass, and so on. Photographic plate detection is more effective than electrical detection in respect of the above requirements. This is due to its inherent simultaneous and integrating detection properties plus such factors as ease of multi-recording, obtainability of high resolution and sensitivity over the complete mass range, and simplicity of mass measurement. In this paper, the above features in respect of photographic plate detection are described and substantiated with their experimental results.
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  • On the Geochemical Studies of Stable Isotopes(IV)
    On the Isotope Geochemistry of Sea Water
    MAKOTO SHIMA
    1965 Volume 13 Issue 29 Pages 25-36
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.25
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    Since the pioneering work of the chemical compositions of the sea water, numerous quantitative analyses have been carried out for supplying the chemical composition table of the sea water. However, a few studies on the isotopic compositions of these elements in the ocean have been reported in the present time. Although the isotopic study of ocean has many difficulties, we can measure with high accuracy and probably represent very accurately the basic ratio for the chemical elements isotope ratio, at least for some elements. According to literatures, the stable isotopic compositions of D, Li, B, C, N, O, Mg, S, Cl, K, Ca, Fe, Br, Sr, Pb and also some natural radio isotope elements in the sea water are collected in this paper. This work is presented as an attempt to provide informations about the isotope geochemistry on the sea water.
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  • The Mass Spectrometric Analysis of Exhaust Gas from Bench Tested Engine with L. P. G. Fuel
    KINJI HIRAMATSU
    1965 Volume 13 Issue 29 Pages 37-44
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.37
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    The exhaust gas composition from a bench tested gasoline engine, driven by L. P. G., has been analysed by mass spectrometer on a wide range of loads. The following results are found: Propane, C3H8(0.03-0.16 mole%), Propylene, C3H6(0.04-0.25 mole%), Ethane, C2H6(0.02∼0.04 mole%), Carbon dioxide, CO2(7.50-12.80 mole%), Carbon monoxide CO, (0.30-4.00 mole%), Oxygen O2(0.80-5.00 mole%), Ethylene, C2H4, (0.03-0.05 mole%). It is also observed that the amount of carbon dioxide increases and those of hydrocarbons and carbon monoxide decrease with increasing number of revolution of the engine from 1, 000 r.p.m. to 2, 500 r.p.m., and they gradually approach to constant values in the range from 2, 500 r.p.m. to 3, 500 r.p.m.
    These results agree with the values which are obtained by gas chromatography, calorimetry and Orsat's method.
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  • Time-of-Flight Mass Spectrometer; Its Improvement and the Progress of the Related Techniques
    HIROSHI TOMITA
    1965 Volume 13 Issue 29 Pages 45-58
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.45
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  • Ion Optics
    HISASHI MATSUDA
    1965 Volume 13 Issue 29 Pages 59-70
    Published: September 01, 1965
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.13.59
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  • Erratum to : Ion Optics
    1965 Volume 13 Issue 29 Pages 70
    Published: 1965
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.13.29_70
    JOURNAL FREE ACCESS
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