Determination of Major Elements in Brine Samples by Polarized Radiation-Energy Dispersive X-ray Fluorescence Spectrometry

In this paper a method for the direct determination of the major elements（S， Cl， K， Ca） in brine samples by the energy dispersive X-ay fluorescence spectrometry is reported. The detection limits are 0.030 g/L for S, 0.015 g/L for Cl, 0.020 g/L for K and 0.008 g/L for Ca. The method has been applied to the determination of these major elements in high salinity brine samples. The results are in agreement with those provided by gravimetry, volumetry and atomic absorption spectrometry with precision of 0.97％～4.16％RSD (n=15) expect for Ca.