過渡放電発光装置による鉄鋼中の微量の酸可溶性アルミニウムの定量分光分析

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タイトル別名
  • Spectrographic Determination of Micro amount of Acid-soluble Aluminium in Iron and Steel with the Transient Discharge Source Unit
  • カト ホウデン ハッコウ ソウチ ニ ヨル テッコウ チュウ ノ ビリョウ ノ サン カヨウセイ アルミニウム ノ テイリョウ ブンコウ ブンセキ

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A new type transient discharge source unit was constructed, by means of which a spectrochemical method was studied to determine acid-soluble aluminium in iron and steel with a porous-cup electrode. With this source unit various discharges are produced by varying the circuit constants (C, R, and L) and the spectra emitted at any given phase of discharge cycles can be photographed. In the present study a relation between these constants and an excitation index was clarified, and excitation conditions were investigated to obtain the stable discharge sufficiently sensitive to micro amount of aluminium. The material and the pre-burning procedure of porous-cup electrodes, which have an important effect upon the sensitivity and the reproducibility, were examined and finally the analytical method was established, by which 0.005 to 0.05 per cent acid-soluble aluminium in iron and steel was determined with the analytical line pair of K I 4044.14 A/Ål I 3961.53 Å.

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