This article introduced an X-ray fluorescence spectrometry method using K_2SO_4+Na_2SO_4 as carrier to detect chlorine,bromine and iodine in bittern. Selections of carrier,the analytic condition of element as well as matrix correction were also included.

DETERMINATION OF TRACE ELEMENTS Rb, Sr AND Zr IN GEOLOGICAL ROCK SAMPLES BY XRF SPECTROMETRY——Application of The Twice Matrix Correction And The Two-Step Background Correction

The matrix effect was corrected by the scattered target-line ratio method for As, Ga, Co, Ni, Br and by the empirical influence coefficients for Cl, S, F.

Modified Calculation of RIGAKU Theoretical Matrix Coefficients and Application in X-Ray Fluorescence Analysis for Samples of Building Materials,Nonmetallic Minerals and Geology

By pressing the magnesia powder into disks directly and correcting the matrix effect, a method for X-ray fluorescence analysis of magnesia was established.

The TiO2, TFe, Al2O3, SiO2, MnO in ilmenite have been measured by XRFA using pelletized powder samples. After separating the calibration curve into two sections or correcting the matrix effects,areasonable accuracy has been obtained.

The samples of mould powder are made by the smelting method. The contents of CaO、SiO2、TFe、MgO、Al2O3 and MnO in powder are analyzed quantitatively by the fluorescence spectrometer of Xray,operation curves are established for every composition and matrix calibration regression calculation are done for the six compositions. Establishment and application of this method can lower labour intensity of chemical analysis and increase the analysis velocity and working efficiency.

The cffects of matrix elements such as Iron, Calcium and Magnesium etc.On measuring trace rare earths have been investigated by using ICP-AES method in different powers. The results show that the effect of matrix elements is reducedwith the increase of power. The suitable values are selected to be 0.75A for anode current measured height is 15mm above the coil and flow rate of carrier gas is 0.8l/mim. Under this condition we worked out ICP-AES method of non matrix elements calibration curve to measure the trace...

The cffects of matrix elements such as Iron, Calcium and Magnesium etc.On measuring trace rare earths have been investigated by using ICP-AES method in different powers. The results show that the effect of matrix elements is reducedwith the increase of power. The suitable values are selected to be 0.75A for anode current measured height is 15mm above the coil and flow rate of carrier gas is 0.8l/mim. Under this condition we worked out ICP-AES method of non matrix elements calibration curve to measure the trace rare earths in ore. This method is fast and convenient and the measured results are accurate.

On the basis of more precise experimental law of beta absorption, the calculation formula for plating thickness measurement by beta backscattering is deduced theoretically in this paper, the validity and universality of this formula are verified experimentally.In addition, according to the analysis of experimental data and the parameters of the formula, the measuring range of common used beta isotopes is given and the principle of base correction technique has also been introduced.

The powder sample was diluted and pressed into a disk,and the 15rare earth elemenls were then determined by PHILIPS PW1400 spectro-meter. The interfering factors were determined for the lines which areseriously interfered by other lines, and the interfered parts were deduc-ted by the determined factors by computer. The complex matric effectswere corrected by α-coefficients, and the results were satisfactory. Themain points investigatied in this work are: selecting of optimum in-strument parameters; correcting...

The powder sample was diluted and pressed into a disk,and the 15rare earth elemenls were then determined by PHILIPS PW1400 spectro-meter. The interfering factors were determined for the lines which areseriously interfered by other lines, and the interfered parts were deduc-ted by the determined factors by computer. The complex matric effectswere corrected by α-coefficients, and the results were satisfactory. Themain points investigatied in this work are: selecting of optimum in-strument parameters; correcting of background, detemining of interferingfactors: and comparing of the results which were obtained by threemathematic models. This method is accurate, 3 times faster than the pre-vious method, and has a wide analysis range. The precision of themethod is better than 5% when rare earth content is less than 2%, andbetter than 2% when rare earth content is more than 2%