X-ray ﬂuorescence analysis of sulfate-ion in aqueous solutions by dried drop technique using a portable spectrometer

In this paper authors propose the methodology of X-ray ﬂuorescence determination of sulfate-ion in aqueous solutions with preconcentration by dried drop technique using portable energy dispersive spectrometer NITON FXL 959 GOLDD+. The represented measuring procedure has been tested in a wide range of sulfate-ion concentrations (10–4200 mg/l) during exploration the groundwater samples of the Over Jurassic Aquifer complex of the Moscow region and drainage water of the sulﬁde porphyry-copper mineralization of the Nakhodka ore ﬁeld (Western Chukotka). Veriﬁcation of the measuring procedure is based on results of the water investigation by ion chromatography and titration methods.