Journal of the Spectroscopical Society of Japan
Online ISSN : 1884-6785
Print ISSN : 0038-7002
ISSN-L : 0038-7002
Volume 11, Issue 3
Displaying 1-4 of 4 articles from this issue
  • Michio OKUDA
    1962 Volume 11 Issue 3 Pages 93-109
    Published: February 28, 1963
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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  • Tomomi OKA, Hiroshi NEMOTO, Sakae KURATA
    1962 Volume 11 Issue 3 Pages 110-115
    Published: February 28, 1963
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    In quantometric analysis, though the cause of error is an important problem, fundamental and systematic studies on this subject have not so far been made.In this regard, the case of rapid quantometric analysis of iron and steel has been taken up to look into the analytical accuracy influenced by sample surface condition and sample setting technique with the results summarized below.
    (1) If the sample surface is finished off with #80-#180 emery paper, the error on analytical results will become negligible.The surface had better be finished rough to a certain extent, for a discharge surface of such finish raises the accuracy of result.
    (2) When the discharge is over small cracks, the result becomes less erroneous.
    (3) If the electrode is so set as a part of the surface near the electrode becomes also a light source.the result will be very much affected by such setting.
    (4) The discharge at 6-8mm away from the edge of sample surface gives the best result. On cast samples, because of possible cavities and uneven structure, the result obtained at the central portion of the sample may deviate largely from the mean value.
    (5) The difference of ±2° in cone-angles of tungsten electrode does not affect the result.
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  • Tomomi OKA, Hiroshi NEMOTO, Sakae KURATA
    1962 Volume 11 Issue 3 Pages 116-123
    Published: February 28, 1963
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    For the purpose of establishing routine quantometric analysis of phosphorus in white cast iron, a study has been made on various conditions of analytical techniques with the following results.
    (1) Excitation by a low voltage discharge (L: 360 teH, C: 30 pF, R: 50) gives satisfactory results.
    (2) Good results with reproducibility of below 4% variation are obtained by 10 sec.of pre-spark time and 20 sec.of constant integration time, the internal standard method being not used.
    (3) This procedure can be applied to the determination of phosphorus content in the range from 0.04 % to 0.6 %.
    (4) To raise the accuracy in this procedure, the following effects on the result should be taken into consideration:
    a) Effect of metallurgical history of the sample
    b) Effect of cracks on the sample surface.
    c) Effect of change in relative positions between exit slit and spectral lines by temperature variation.
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  • Part 2: Quantitative Analysis of Some Rare Earths in Uranium Compounds
    Isoo MASUDA, Hisayoshi ICHIHARA, Yamato ONISHI, Kakuzo TADA
    1962 Volume 11 Issue 3 Pages 124-128
    Published: February 28, 1963
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Some lanthanide rare earths separated from uranium compounds are analysed by O2-dc arc excitation. Because the method ignores the selective volatilization, presence of other metallic elements affects sensitively the spectral intensity of rare earths.
    Detection limit of the method is as follows when the sample taken is 10 grams.
    Dy: 0.003, Eu: 0.003, Gd: 0.0075, Sm: 0.03 in P.P.M.unit.
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