Spectrographic Determination of Microamount of Aluminium in Iron and Steel with the Transient Discharge Source Unit

概要

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A new type transient discharge source unit was constructed, by means of which a spectrochemical method was studied to determine microamount of 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 discharge stable and sensitive to microamount of aluminium. The material and the preburning 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 of aluminium in iron and steel was determined with the analytical line pair K I 4044.14A/Al I 3961.53A
東北大学の論文