過渡放電発光装置によるMgの中の微量Caの定量分光分析

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タイトル別名
  • Spectrographic Determination of Microamount of Calcium in Magnesium with the Transient Discharge Source Unit
  • カト ホウデン ハッコウ ソウチ ニ ヨル Mg ノ ナカ ノ ビリョウ Ca ノ テイリョウ ブンコウ ブンセキ

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A spectrographic method was studied to determine microamounts of Ca in Mg metal and Mg alloy, and it was found that Ca in Mg could be determined by exciting sample solution in a porous-cup electrode with the transient discharge source unit. The results obtained were as follows: (1) In consideration of the viscosity of Mg solution and the spectral intensity of Ca, 0.5 g of sample was dissolved in HCl and afterwards diluted to 50 mL. (2) The discharge conditions were E(discharge voltage)=200 V, C=18 μF, L=30 μH, and R=2 Ω. (3) Exposure was started after 15-sec preliminary discharge, as the discharge in stabilized with in several seconds after its start. (4) Al, Zn, Mn, Fe and Zr contained in Mg alloys had no influence on tne analytical results of Ca, excepting the case when samples contained about 5% of Zn. (5) Samples containing 0.01 to 0.3% of Ca were analysed with Sr II 4215.52 Å/Ca II 3933.67 Å as the analytical line pair, the reproducibility being 5 to 7% of the content of Ca. (6) It was ascertained that the lower limit of the determination of Ca could be extended down to about 0.001% by using Mg of higher purity as the base material.

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  • 日本金属学会誌

    日本金属学会誌 25 (4), 251-254, 1961

    公益社団法人 日本金属学会

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