Direct-reading spectrometer for ferrous analysis.

The direct-reading spectrometer, previously described by Saunderson, Caldecourt, and Peterson of the Dow Chemical Company, has been adapted for ferrous analysis. Data is given on reproducibility of analytical results obtained for Ni, Cr, Si, Mn, Cu, Mo, Al, and Sn in steel. The inherent accuracy of the instrument is discussed with respect to both the electronic and photometric systems employed. Errors introduced are shown to be small compared with spectrochemical uncertainties inherent in the source.