Determination Of Major,Minor And Trace Elements In Soil Samples Based On X-Ray Fluorescence Spectrometry

Multi target geochemical survey is an interdisciplinary, innovative and comprehensive research in the field of engineering, one of the most basic content of the work is high precision analysis of 52 elements in soil samples with scale of 1:25million and 2 indicators. Among them C, N, Cl, S, Br, Ga, Sc, Ce, I, Se, Ti, organic carbon, pH and other 15 projects of the analysis of the previous geological survey work in the system has not been studied at the same time. The above new projects,such as using the classical analysis methods, some of the long process, high cost, and high labor intensity is not suitable for large quantities of samples of the detection process, some of the quality of the analysis cannot meet the requirements.In this thesis, we used the solid powder pressed samples, using RIGAKU ZSX Primus type ? type X-ray fluorescence spectrometer for the determination of 30 components in soil samples, such as C, N, Na₂O, MgO, Al₂O₃, SiO₂, P, S, Cl, K₂O,CaO, Tl, V, Cr, Co, Ni, Cu, Mn, TFe₂O₃, Zn, Ga, Nb, Zr, Y, Sr, Rb, Pb, Th, Ba and Br.The determination conditions of elements such as C, N, Cl, S, and the background of the trace elements and the overlap correction of the spectral lines were studied. Using the empirical coefficient method and the Compton scattering line, the background scattering line is used as the internal standard to correct the matrix effect.The method is simple, high efficiency and low cost, especially suitable for large sample size, analysis of the project and a number of test and analysis work. In particular, the advanced functions of the new X- ray fluorescence spectrometer are used to solve the problems of C, N, Cl, S, Br, Ga and other 30 elements. By the national standard material calibration, the method of detection limit, precision and accuracy to meet the requirements of the analysis of multi- target geochemical survey samples.