巻号一覧
11 巻, 3 号
選択された号の論文の4件中1～4を表示しています
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奥田 典夫1962 年 11 巻 3 号 p. 93-109
発行日: 1963/02/28
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (2273K) -
岡 友美, 根本 弘, 倉田 栄1962 年 11 巻 3 号 p. 110-115
発行日: 1963/02/28
公開日: 2010/06/28
ジャーナル フリーIn quantometric analysis, though the cause of error is an important problem, fundamental and systematic studies on this subject have not so far been made.In this regard, the case of rapid quantometric analysis of iron and steel has been taken up to look into the analytical accuracy influenced by sample surface condition and sample setting technique with the results summarized below.
(1) If the sample surface is finished off with #80-#180 emery paper, the error on analytical results will become negligible.The surface had better be finished rough to a certain extent, for a discharge surface of such finish raises the accuracy of result.
(2) When the discharge is over small cracks, the result becomes less erroneous.
(3) If the electrode is so set as a part of the surface near the electrode becomes also a light source.the result will be very much affected by such setting.
(4) The discharge at 6-8mm away from the edge of sample surface gives the best result. On cast samples, because of possible cavities and uneven structure, the result obtained at the central portion of the sample may deviate largely from the mean value.
(5) The difference of ±2° in cone-angles of tungsten electrode does not affect the result.抄録全体を表示PDF形式でダウンロード (898K) -
岡 友美, 根本 弘, 倉田 栄1962 年 11 巻 3 号 p. 116-123
発行日: 1963/02/28
公開日: 2010/06/28
ジャーナル フリーFor the purpose of establishing routine quantometric analysis of phosphorus in white cast iron, a study has been made on various conditions of analytical techniques with the following results.
(1) Excitation by a low voltage discharge (L: 360 teH, C: 30 pF, R: 50) gives satisfactory results.
(2) Good results with reproducibility of below 4% variation are obtained by 10 sec.of pre-spark time and 20 sec.of constant integration time, the internal standard method being not used.
(3) This procedure can be applied to the determination of phosphorus content in the range from 0.04 % to 0.6 %.
(4) To raise the accuracy in this procedure, the following effects on the result should be taken into consideration:
a) Effect of metallurgical history of the sample
b) Effect of cracks on the sample surface.
c) Effect of change in relative positions between exit slit and spectral lines by temperature variation.抄録全体を表示PDF形式でダウンロード (1030K) -
第2部: 希土類の定量増田 磯雄, 市原 寿義, 大西 和, 多田 格三1962 年 11 巻 3 号 p. 124-128
発行日: 1963/02/28
公開日: 2010/06/28
ジャーナル フリーSome lanthanide rare earths separated from uranium compounds are analysed by O2-dc arc excitation. Because the method ignores the selective volatilization, presence of other metallic elements affects sensitively the spectral intensity of rare earths.
Detection limit of the method is as follows when the sample taken is 10 grams.
Dy: 0.003, Eu: 0.003, Gd: 0.0075, Sm: 0.03 in P.P.M.unit.抄録全体を表示PDF形式でダウンロード (682K)
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