Determination of Potassium, Neodymium, and Strontium in Solid Solutions in the KNd(SO4)2·H2O–SrSO4·0.5H2O System Using X-Ray Fluorescence Spectrometry

Abstract

The composition of solid solutions in the KNd(SO₄)₂·H₂O–SrSO₄·0.5H₂O system, synthesized from aqueous solutions of KCl, NdCl₃, SrCl₂, and H₂SO₄, was studied by X-ray fluorescence spectrometry. Coefficients of calibration dependences for intensity vs. element concentrations were calculated for Nd, Sr, and K by the least-squares technique. A linear approximation function was used in determining potassium and a parabolic approximation function was recommended in determining neodymium and strontium. The obtained dependences are characterized by low (<1%) relative approximation errors. In the analytical ranges (wt %) for K 0.863−8.892, Sr 8.41−38.03, and Nd 5.296−29.30, the standard deviations were 0.012−0.028, 0.008−0.098, and 0.05−0.27 respectively.