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Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy | 1967

Vacuum emission spectrometric determination of oxygen in iron and steel

Hidehiro Goto; Shigero Ikeda; Kichinosuke Hirokawa; Mitsuyasu Suzuki

SummaryA method is described for the determination of the oxygen content of steels by means of a ultraviolet vacuum-spectrographic method. A d.c. carbon arc discharge was used to extract the oxygen as carbon monoxide from the sample. The intensity ratio of OI 1302.17 Å/CII 1721.66 Å was used on the condition of 200 V, 60 μF, 18 A and the argon pressure of 600 mm Hg. The oxygen can be determined within a concentration range of 0.008 to 0.08% in various steel samples with a variant coefficient of 8 to 17%.ZusammenfassungZur Bestimmung des Sauerstoffgehaltes von Stählen wird eine UV-vakuumspektrometrische Methode empfohlen. Eine Gleichstrom-Bogenentladung an der Graphitelektrode wird benutzt, um den Sauerstoff aus den Proben als Kohlenmonoxid zu extrahieren. Das Intensitätsverhältnis von OI 1302.17 Å/CII 1721.66 Å wird unter den folgenden Anregungsbedingungen gemessen: 200 V, 60 μF, 18 A, Argondxuck 600 mm Hg. Sauerstoffgehalte von 0.008–0.08 % in verschiedenen Stählen werden mit einer Standardabweichung von 8–17% bestimmt.


Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy | 1966

Direct-Reading, Time-Resolving Technique in Emission Spectroscopy and its Application to the Analysis of Iron, Steel and Iron Ores

Hidehiro Goto; Shigero Ikeda; Akira Saito; Mitsuyasu Suzuki

SummaryAn attempt of the time-resolution of emission spectra was carried out using a simple pulse generator by impressing a gate pulse on the dynodes of a photomultiplier tube in the direct-reading spectrometer. Examinations were made on the variation of the intensity of spectral line with time in various atmospheres and it was confirmed that the after-glow is the longest in an argon atmosphere.The possibility of avoiding the effect of an interfering spectral line lying close to the analytical line was examined and this was proved to be possible with the analytical line of Si I 2881.58 å and the interfering line of Cr II 2881.93 å. The analytical line of calcium, Ca II 3933.67 å, is interfered by Fe I 3933.61 å and the effect of the spectral line of iron was avoided by the use of the time-resolving technique. This permitted the rapid determination of 0.001∼0.1% of calcium in iron ores by the direct-reading spectrographic analysis.ZusammenfassungEin Versuch der zeitlichen Auflösung von Emissionsspektren wurde durchgeführt unter Verwendung eines einfachen Impulsgenerators, indem man den Eröffnungsimpuls auf die Dynoden eines Photovervielfachers in einem direktschreibenden Spektrometer überlagert. Untersucht wurde die VerÄnderung der LinienintensitÄt in verschiedenartigen AtmosphÄren. Man konnte bestÄtigen, da\ das Nachglimmen in ArgonatmosphÄre am lÄngsten dauert.Auch die Möglichkeit der Vermeidung der Störung durch benachbarte Spektrallinien wurde untersucht und gefunden, da\ die Vermeidung der Störung bei der Linie Si I 2881,58 å und der Störlinie Cr II 2881,93 å möglich ist. Die Analysenlinie Ca II 3933,67 å wird durch die Linie Fe I 3933,61 å gestört, was durch die Zeitauflösungstechnik vermieden wird. Dadurch wird es möglich, 0,001–0,1% Calcium in Eisenerzen durch direktschreibende spektrographische Analyse zu bestimmen.


Bunseki Kagaku | 1964

A study of atomic absorption spectrometry

Hidehiro Goto; Shigero Ikeda; Ikuo Atuya


Nippon Kagaku Kaishi | 1960

Determination of Lanthanum by Flame Spectrophotometry.

Hidehiro Goto; Shigero Ikeda; Emiko Sudo


Bunseki Kagaku | 1954

Polarographic Determinations of Tin and Antimony in Iron and Steel

Hidehiro Goto; Shigero Ikeda; Shiro Watanabe


Review of Polarography | 1964

Electroanalytical Chemistry in the Chemical Analysis of Iron and Steel

Hidehiro Goto; Shigero Ikeda


Journal of The Japan Institute of Metals | 1964

Determination of Hydrogen in Iron and Steel by the Argon Gas Carrier Hot Extraction Method

Hidehiro Goto; Shigero Ikeda; Minoru Hosoya


Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy | 1963

Flame Spectrophotometric Determination of Calcium in Cast Iron

Hidehiro Goto; Shigero Ikeda; Jin Kimura


Journal of The Japan Institute of Metals | 1963

Determination of Oxygen in Iron, Steel and Ferrous Alloys by the Argon Gas Carrier Fusion Method

Hidehiro Goto; Shigero Ikeda; Akira Onuma; Takashi Shimanuki


Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy | 1962

Determination of Component in Binary Alloy by Backscattering of Beta Particles

Hidehiro Goto; Shigero Ikeda

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