Abstract
The addition method (Fig. 1) previously reported, which is applicable to the concentrated solution, has been applied to the determination of rare-earth elements. The measurements were done separately on two classified groups, i. e. cerium-group elements and yttriumgroup elements. As the analytical lines were selected K lines for the former (Fig. 2) and L lines for the latter, respectively, taking into consideration their mode of overlapping. Respective lines are given in Table II. Studies were made to the treatment of higher background values for K series (Fig. 3) and also to the correction for some overlappings of L series spectra (Fig. 4).
The analysis of synthetic samples by this method gave values with less than 5% of relative errors in the presence of diverse elements (Table III).
