Spectrographic Method for the Determination of Rare Earths in Gadolinium Oxide of Moderate Purity

摘要

An emission spectrographic method for the analysis of Sm, Dy, Tb and Ho in gadolinium oxide of 80% to 99% purity is discussed. The method involves the arcing of the samples in d.c. arc and photographing the resulting spectra using 3.4 m Jarrell Ash Grating Spectrograph in the region 3250 - 3550 A. Graphite powder containing 10% BaF sub 2 is used as diluent to help the smooth burning of the samples. The above impurities are estimated in the range 0.1 to 5%. The percentage standard deviations for the determination of these elements lie between 5 to 16%. (Atomindex citation 11:561585)