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Volume 16 (1967 - 196･･･
- Issue 6 Pages 237-
- Issue 5 Pages 197-
- Issue 4 Pages 151-
- Issue 3 Pages 103-
- Issue 2 Pages 55-
- Issue 1 Pages 1-
Volume 16, Issue 2
Displaying 1-5 of 5 articles from this issue
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Shiro MAEDA1967 Volume 16 Issue 2 Pages 55-63
Published: October 31, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1200K) -
Hiroshi TANABE, Yoshifumi ISHII, Hirokazu ASAI, Jun-ichi ONO1967 Volume 16 Issue 2 Pages 64-68
Published: October 31, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIt is generally considered that gratings used in vacuum spectrometers have to be replaced after certain service period because by the adherance of oil vapor on the grating surface.
To prolong the life of gratings, much efforts have been made;some of them include replacement of a vacuum pump and setting an oil vapor adsorber between the spectrometer and the evacuating system.These are not the perfect means for prevention of grating deterioration.
On the other hand, attaching an air filter at the outer side of the leak valve of the spectrometer shows much superior result.For the last 20 months, the grating has proved to be free from any remarkable deterioration.The filter consists of soda lime and molecular sieve as an adsorbers of water vapor and air impurities.The filter at the leak value is also effective for prolongation of life 'of vacuum pump oil and reduction of evacuation time of the spectrometer.View full abstractDownload PDF (788K) -
Isoshi KAWASHIMA, Takeshi MIYAZAKI, Isamu TANAKA1967 Volume 16 Issue 2 Pages 68-77
Published: October 31, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSBy the iron oxide powder-d.c.arc-spectrographic method, the concentration of rhodium (rangingfrom 0.004 to 0.6%), palladium (0.0003 to 0.6%), iridium (0.004 to 0.6%) and platinium (0.001 to 0.4%) in iron and stainless steel were determined by the use of standard samples composed of electrolytic iron and known amounts of the above four elements.For high alloy steels, a correction. was made for the iron contents in the sample.It was found that the standard deviation of measurements of the concentration of rhodium, palladium and iridium is less than 0.008 % for samples of 6% Ni steel and 18% Cr steel in which the concentrations of rhodium, palladium, and iridium are 0.2%, . 0.05-0.2%, and 0.05-0.25%, respectively.View full abstractDownload PDF (969K) -
Shigeru TSUTSUI, Shigeo MINAMI, Shigeru FUJITA1967 Volume 16 Issue 2 Pages 78-89
Published: October 31, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor analyzing signal flow in spectroscopic instruments, an analog simulator has been constructed. In this simulator, all the elements in the actual spectroscopic instruments are replaced by electronic components such as relays, potentiometers, operational amplifiers, etc.Besides detailed explanations of the apparatus itself, a method of depicting the actual instruments by simple block diagrams is discussed.In operation, the simulated spectra, which are synthesized by means of the Gaussian and the Lorentzian function generators, are fed into the input terminals from a magnetic tape recorder. The over all accuracy of simulation is better than 0.5 percent;especially the accurary of the computor section is about 0.2 percent.The apparatus described here is expected to be useful not only for deciding the parameters needed in the design of new kind of instruments, but also for estimating the systematic error which appears in the operation of existing commercial instruments.View full abstractDownload PDF (2137K) -
Isoshi KAWASHIMA, Isamu TANAKA1967 Volume 16 Issue 2 Pages 90-95
Published: October 31, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSBy the iron oxide powder-d.c.arc-spectrographic method, the concentration of beryllium in iron, steel, and high nickel alloy steel was determined in the range from 0.0002 to 0.14 per cent by the use of standard samples composed of electrolytic iron and known amounts of this element.Be II 3130.416 A was found the best out of eight spectrum lines between 2, 300 and 3, 400 A.It was found, in analysis of beryllium of the range from 0.0026 to 0.14 per cent in 6% nickel alloy steels, that the repeatability was 0.14±0.002, 0.014±0.0008 and 0.0026±0.0002 per cent in standard deviation, and the accuracy of this spectrographic method was comparable to that of the chemical method.Using the steels whose composition had been determined by the present method as the standards in the ingot spectrographic method, calibration curves of Be II 3130.416 A were obtained for an arc or spark method. The spark method was better than the high voltage a.c.arc in the limit of detection and the liner range.View full abstractDownload PDF (811K)
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