Journal of the Spectroscopical Society of Japan
Online ISSN : 1884-6785
Print ISSN : 0038-7002
ISSN-L : 0038-7002
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Volume 21, Issue 5
Displaying 1-4 of 4 articles from this issue
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  • Spectroscopic Analysis of Air Pollution with Laser Radar Techniques
    Takao KOBAYASI, Hurnio INABA
    1972 Volume 21 Issue 5 Pages 295-315
    Published: October 31, 1972
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.21.295
    JOURNAL FREE ACCESS
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  • Atomic Absorption Spectrochemical Analysis of Mercury with a Y Type Reaction Tube
    Kazuo SHIRAHAMA, Seiji WATANABE, Takeshi MAKI
    1972 Volume 21 Issue 5 Pages 316-321
    Published: October 31, 1972
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.21.316
    JOURNAL FREE ACCESS
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    In the determination of mercury by atomic absorption Spectrometory, the high sensitivity is obtained by the addition of reducing agents.But the decrease of absorbance is observed on standing.To eliminate this standing effects, Y-type reaction tube was used.The process is that mercury solution and reducing agent solution are aspirated separately and the two solutions are mixed in a Y-type reaction tube.Furthermore, the effect of reducing agents, acids, pH and diverse ions were investigated.Among reducing agents, tin (II) chloride was found to be the best agent and absorbance could be raised to about fifteen-folds.Detection limit of this method was 0.02ppm of mercury and the coefficient of variation was 1.1% at 10ppm Hg level. When the ammonium nitrate was contained, the absorbance of mercury was constant at a pH of 1-10.
    One ppm of I- and 200ppm of SCN- affected, but interference of other ions is negligible. The analytical results of mercury in numerical indicator tube by this method was satisfactorily in agreement with dithizone method.
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  • Stain of Sample Surface in Laser Microspectral Analysis
    Tsuneko YAMANE
    1972 Volume 21 Issue 5 Pages 322-327
    Published: October 31, 1972
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.21.322
    JOURNAL FREE ACCESS
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    In laser microspectral analysis using cross-excitation by an auxiliary spark discharge, a stain produced around a crater was presumed to be due to deposit of carbon from the electrodes and oxidation of the sample surface heated by the spark plasma.The form and degree of the stain vary with the spark discharge condition.That is, the forms were coincident with those of spark plasma observed under various conditions, and in case a flat spark plasma was used, both amounts of carbon and oxygen were less than those produced when a spherical spark plasma was employed.
    In order to prevent the sample surface from being stained, it was desirable to select the discharge condition so as to produce the flat spark plasma and moreover to increase the distance between the sample and the electrode points.In case it was desired to analyse the thin surface layer only, a good result was obtained by displacing the focus of the laser beam upward by several hundreds microns from the sample surface and by selecting the spark discharge condition to produce the flat spark plasma.
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  • Infrared Absorption and Raman Scattering
    Mitsuo TASUMI, Tatsuo MIYAZAWA
    1972 Volume 21 Issue 5 Pages 328-336
    Published: October 31, 1972
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.21.328
    JOURNAL FREE ACCESS
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