1959 年 8 巻 1 号 p. 19-31
Stainless steel is quantometrically analysed by a large spectrometer fitted with a grating of high dispersion.The spectrometer is of the largest type used in quantometers;its dispersion is 3.3A/mm (1st order), yet there was some difficulty in selecting spectral lines.Feussner's spark is used for excitation with a plane-finished sample as the upper electrode and a tungsten rod as the counter electrode.12000 volts as the secondary voltage, 0.0033 micro farads as the capacitance, 20 seconds as the pre-spark time and only the residual inductance were for obtaining suitable excitation.
Results are in agreement with those of chemical analysis with errors of less than 1% for Ni and Cr and less than 2% for Si, Mn, Cu and Mo.
As the analysis on different kinds of stainless steel is influenced by coexisting elements, parallel working curves are prepared by using standardized samples. The error caused by variation of Fe content is corrected by multiplying set values by a coefficient.