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 1960, Issue 15
Displaying 1-13 of 13 articles from this issue
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  • Recollections of My Studies of Mass Spectrometry
    Nobuji Sasaki
    1960 Volume 1960 Issue 15 Pages 1-4
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_1
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  • A New Mass Spectrometer of Impulsive Type
    Junjiro Kai
    1960 Volume 1960 Issue 15 Pages 5-15
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_5
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    If the accelerating voltage in a ion source is cut off before any of the ions leave the accelerating field, all the ions with same charge receive the same momentum. As the energy spectrum of such ions is the mass spectrum, is possible to devise a new mass spectrometer of impulsive type. A mass spectrometer based on such a principle was constructed. The pulse length of accelerating voltage was several hundreds millimicroseconds and the repetition rate was 5, 000 pulses per second. The accelerating field strength was about 70 volts per centimeter. The ionization electrons were put into the ionization chamber during the accelerating impulses were turned off. Two types of energy selector were used to get the mass spectrum of ions, the one consisted of radial electric field and the other retarding electric field. In this preliminary experiment, argon and nitrogen peaks could be resolved, and the resolving power was estimated to be about three.
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  • A Mass Spectrometer for the Micro-analysis in Osaka University(I)
    Jun Okano, Koreichi Ogata, Yasuo Nakajima, Nozomu Morito, Tamotsu Noda ...
    1960 Volume 1960 Issue 15 Pages 16-25
    Published: May 31, 1960
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_16
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    A mass specrometer for the quantitative analysis of micro-size gas samples, especially rare gases, has been constructed at Osaka University. The mass spectrometer is 90°-sector type and its mean ion radius is 200mm. Its main parts are made from stainless steel and gaskets of aluminium of 0.5mm thikness are used for vacuum shielding. The shape of wedges and ditchs being on flanges for vacuum shielding are quite similar to the Hintenberger's. And also the main valve and the gas inlet needle leak were designed according to Hintenberger's principle. Theevacuating system consists of a 4″ oil diffusion pump(Apiezon oil C)followed by dry-ice and liquid nitrogen cold traps in series. The analysing tube, including the ion source part, the ion collector part and the main valve part, can be baked out up to about 400°C. At the present state, by about 20 hours' evacuation and baking(at about 150°C)followed by about 20 hours' baking of ion source the ulutimate pressure of 5-20×10-9mmHg can be easily obtained. On this condition, the main residual peaks are those of M/e 18 and 28, and their peak heights are about ten times of detector noise level(1-2×10-5 amp.). M/e 17, 32 and 44 peaks are detectable but other peaks up to M/e 200 are covered with the noise level. Under these coditions, the static operation of 30-60min. duration can be carried on and the increasing characteristics of back ground peaks were investigated. As the preliminary experiment the isotopic abundance ratios of some argon samples of 10-4-10-5ccNTP(radiogenic argon extracted from a few gram of muscovite, electromagnetically enriched argon 36 and their mixture gas)were determined under static operation. For example, the measured Ar36/Ar40 ratio of one mixture sample was 0.3583±0.0002. (This value is not corrected for any kinds of expected mass discriminations.)
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  • The Study on a Secondary Electron Multiplier Tube(II)
    Masami Michijima, Masayuki Gotoh
    1960 Volume 1960 Issue 15 Pages 26-32
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_26
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    A 12-stage secondary-electron multiplier with CuBe alloy(2% Be)dynodes was constructed. The dynodes were treated and polished by the same method as previously reported. The over-all gain of this multiplier, when installed in a mass spectrometer, settled down to about 104, the applied voltage being 300 volts per stage and the ion energy about 5.6KV. The noise level, measured with the vibrating reed electrometer, corresponds to the ion current of about1.5×10-18A at the pressure of 1.4×10-5mmHg. The over-all gain is nearly constant in the pressure region of -10-5mmHg, and is not seriously affected by exposure for a short time.
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  • On Electron Emission Regulator Circuit
    Hirohiko Ezoe, Osamu Tsukakoshi
    1960 Volume 1960 Issue 15 Pages 33-42
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_33
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    The electron emission regulator circuit, which is usually used for a convenitonal Nier-type mass spectrometer, is analyzed and the results are compared with those obtaind experimentally. The formulae expressing the current and the power supplied to the filament which emits the electrons to be regulated are given assuming the ideal power supply transformer and the linear characteristics of the control tubes, and the calculated values are well agreed with the results obtained by experiments within a few per cent in error. Design procedures and diagrams led from the analyses are given also.
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  • Isotopic Analysis of Lead by Tetramethyl Lead Method
    Kazuo Sato, Nobufusa Saito
    1960 Volume 1960 Issue 15 Pages 43-51
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_43
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    In connection with the age determination of geologic samples, an attempt was made to improve the tetramethyl lead method which is commonly used for the isotopic analysis of lead. A micro-scale appliance was devised to prepare tetramethyl lead from lead iodide in small quantities. Anisole was used as a solvent for the Grignard, s reaction with the intention of increasing partial pressure of tetramethyl lead in a gas mixture on which the isotopic analysis of lead was carried out. This led the authers to perform the isotopic analysis of lead in suchasmall quantity as 200 μg with a mass spectrometer, CEC21-103A. Detailed discussions are made on the whole experimental procedure as well as the analysis of mass spectra.
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  • Mass Spectrometric Study on Mechanism of Formation of Organic Molecular Ions. I
    Itiro Omura, Nozomu Morito, Yasuo Nakajima, Hitoshi Tsuyama
    1960 Volume 1960 Issue 15 Pages 51-57
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_51
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    This paper describes the result obtained on the decomposition of paraffins and olefins by electron impact. Appearance potentials of three paraffins and four olefins are determined with a Hitachi Mass Spectrometer Type RMS-3. Bond energies between atoms in some paraffins and olefins are deduced from the appearance potentials of ion fragments. Mass spectra have also been taken over a wide range of ionization voltage. The variation of the amount of ion fragment with the increase of ionization voltage can be divided into three types.
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  • Application of Mass Spectrometry on Routine Analysis(III)
    Mass Spectrometry of Aromatic Compounds
    Yoshio Kubota
    1960 Volume 1960 Issue 15 Pages 58-67
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_58
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  • Max-Planck-Institut fur Chemie(Mainz)
    Teruo Hayakawa
    1960 Volume 1960 Issue 15 Pages 68-86
    Published: May 31, 1960
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_68
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  • Erratum to : SPECIAL CONTRIBULION
    1960 Volume 1960 Issue 15 Pages 96a
    Published: 1960
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_96a
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  • Erratum to : Measurements of Natural Isotopic Abundances by Surface Ionization Method
    1960 Volume 1960 Issue 15 Pages 96b
    Published: 1960
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_96b
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  • Erratum to : Applications of Mass Spectrometry on Routine Analysis(II)
    1960 Volume 1960 Issue 15 Pages 96c
    Published: 1960
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_96c
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  • Erratum to : A few Comments on ATLAS CH3/57Mass Spectrometer
    1960 Volume 1960 Issue 15 Pages 96d
    Published: 1960
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.5702/massspec1953.1960.15_96d
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