二強度法を用いるパルス分布測光-発光分光分析による鋼中アルミニウムの態別定量

抄録

On rapid determination of total, acid soluble and insoluble contents of aluminium in steel by emmision spectrochemical method with pulse height distribution analyzer, it was made clear that each intensity of pulse distribution was composed of several factors, such as soluble and insoluble aluminium, interfering elements and background, and that influence degrees of these factors change with pre-spark pulses and kind of intensity. Among these factors, influence degree ratio of insoluble to soluble aluminium changed from 1.47 to 3.05 in this study. This fact was the cause of error in using one intensity method. In order to eliminate this error, the ratio should be corrected by using two intensities which are different in the ratio. Good accuracy for determining total, soluble and insoluble aluminium was obtained by using 40% and 70% intensities at 2 000 pre-spark pulses. It was also found on standardization method of this two-intensity method that coefficient ratio for two intensities of calibration equation can be considered constant and that almost the same standardization method as one-intensity method can be used.