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Volume 15 (1966 - 196･･･
- Issue 6 Pages 193-
- Issue 5 Pages 155-
- Issue 4 Pages 115-
- Issue 3 Pages 81-
- Issue 2 Pages 43-
- Issue 1 Pages 1-
Volume 15, Issue 4
Displaying 1-4 of 4 articles from this issue
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Taizo SASAKI1967 Volume 15 Issue 4 Pages 115-122
Published: February 28, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (4959K) -
Studies on the Atmosphere for Spectrographic AnalysisJiro KASHIMA, Masaaki KUBOTA1967 Volume 15 Issue 4 Pages 123-130
Published: February 28, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSUsing pure metals and low alloy steel as sample electrodes, the influences of argon flow rate upon the line-intensity of Fe II, Al I and Cu I and the intensity ratio of Al I to Fe I line are investigated.The variation of line intensity and its ratio is thought to be caused by changes in volatility and emissivity of the electrodes.When the argon is introduced into a spark gap in the open air through a glass tube situated so that the gas stream may envelope the spark column, the variation is found to be minimized at an argon flow rate of 1l/min.However, as the oxygen from the air is not perfectly intercepted by this method, it leads the“diffuse-type”discharge which results in a low spectral intensity and a somewhat time-dependent intensity ratio.
Desirable result is obtained by using a spark chamber made of a quartz tube to avoid oxidation in the spark.When argon gas is introduced into the chamber at a flow rate of 1l/min., the variation in lines-intensity and intensity ratio is reduced to the minimum.In case of a still atmosphere or a small flow rate such as 0.1l/min., the erosion rate of iron electrode is low because oxygen and the other gases evolved from the electrodes during sparking are apt to concentrate in the vicinity of the spark gap.View full abstractDownload PDF (2162K) -
Shizuya MAEKAWA, Takanori SUZUKI1967 Volume 15 Issue 4 Pages 131-138
Published: February 28, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor the purpose of establishing the quantometric analysis of all in several kind of low alloy steel and 13% chromium steel as routine works, a study has been made on the spark conditions and on the interference lines.
The results obtained are as follows:
When the spark is of low voltage with negative polarity at the sample side, there is a large interference near O.10% in the concentration of Mo.With positive polarity at the sample side, however, there is no interference by Mo.But some correction is necessary above O.10% in the concentration of V.
It is recognized that there is a significant relation between the analytical results ot steel and tne cleanness of the specimen.Further, it is confirmed that the grinding of the sample with emery paper affects on the correctness of the quantometric results.View full abstractDownload PDF (1046K) -
Akira TSUKAMOTO, Hiroshi TAMARI, Kei OKUYAMA1967 Volume 15 Issue 4 Pages 139-147
Published: February 28, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA study on the excitation conditions and the analytical precision with use of the Shimadzu Vacuum Quantorecorder (or the Quantovac) was made for continuous, rapid and accurate analysis of cast iron, whose Carbon concentration was from 2.80 to 4.20%.It was found that Multisource gave the least variation at 50 μH, 6, 6μF, 5 Ω, and the reproducibility was 1.00% or less in terms of C.O.V.for each element.Further more, the Ag counter electrode could be continuously used for more than 750 analyses. Especially, under this condition, the excellent accuracy is easily attained in the routine analytical works which require successive disposal within 2 minutes.View full abstractDownload PDF (5180K)
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