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Volume 14 (1965 - 196･･･
- Issue 6 Pages 215-
- Issue 5 Pages 181-
- Issue 4 Pages 131-
- Issue 3 Pages 87-
- Issue 2 Pages 41-
- Issue 1 Pages 1-
Volume 14, Issue 4
Displaying 1-5 of 5 articles from this issue
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Hitoshi YOSHIDA, Seiichiro HIKIME1966 Volume 14 Issue 4 Pages 131-141
Published: January 31, 1966
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1658K) -
Hiroshi TANABE, Yoshifumi ISHII, Hirokazu ASAI1966 Volume 14 Issue 4 Pages 142-146
Published: January 31, 1966
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe accuracy of analytical value of C in steel by QUANTOVAC analysis depends on the purity of argon gas.After some experiments, the cause of unsteadiness of C value in the analysis was found to be hydrocarbon in argon gas.Use of a special gas bomb provided with a molecular sieve lter led to satisfactory results.View full abstractDownload PDF (2523K) -
Kunihide MATSUNAGA, Shigeo MINAMI1966 Volume 14 Issue 4 Pages 147-154
Published: January 31, 1966
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA method of evaluating the effect of chopping frequency on the NS ratio that determines principally the accuracy of infrared spectrophotometry is given.The NS ratio has two components: one is due to harmonics, the so-called ripple signal, and the other the random noise.The periodic ripple component is determined by analysing the harmonics in waveform of output from the system that follows the synchronous re-tifier.The random noise component is computed in consideration of the factors such as characteristics of the detectors, power spectrum of the detector noise and overall bandwidth of the system.For realization of the above, appropriate chopping frequency ranges of commercial near infrared, infrared and far infrared spectrophotometers are calculated.View full abstractDownload PDF (1305K) -
Limit of Determination by the Point-to-plane Spark or High Voltage A-C Arc TechniqueSizo HIRANO, Isoshi KAWASHIMA1966 Volume 14 Issue 4 Pages 155-163
Published: January 31, 1966
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWith JACO 3.4m ebert-type spectrograph, the limit of emission spectrographic determination of residual elements (Al, B, Co, Cr, Cu, Mo, Nb, Ni, Pb, Sn, Ta, Ti, V, W, Zr) in iron and steel by point-to-plane technique is studied.
The excitation is by either a high voltage a-c arc or a spark source depending on the concerned element.For preparing the calibration curve, linear scale graph paper is used instead of log-log or semi-log graph paper.This method is found more accurate and reliable than the conventional: the above elements except Ta were determined with errors of less than 10% when the concentration was higher than 0.001%.View full abstractDownload PDF (1074K) -
Torao KAWACHI, Mieko SUZUKI1966 Volume 14 Issue 4 Pages 164-168
Published: January 31, 1966
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA new type atomic absorption-flame photometer has been devised for accurate measurement, ease of operation, low cost and wide availability.It is fitted with matched interference filters, silicon photocell or photomultiplier tube and A.C.amplifying circuit.The choice between using atomic absorption method and flame analytical method is effected easily by one touch on a switch or a turn of a knob.The atomic absorption method gives less interference and better calibration curve than the flame analytical method, nevertheless, obtained results by both methods proved high stability, sensibility and reproducibility of the photometer.View full abstractDownload PDF (598K)
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