Simulation Study of Quantitative X-Ray Fluorescence Analysis of Ore Slurry Using Partial Least-Squares Regression

Abstract

X-ray fluorescence (XRF) in combination with partial least-squares (PLS) regression was employed to analyze the ore slurry grade. Using the Monte Carlo simulation code PENELOPE, X-ray fluorescence spectra of ore samples were obtained. Good accuracy was achieved when this method was used to analyze elements with concentrations of several percent or above. It was demonstrated that the more the number of X-ray fluorescence spectra used to calibrate, the better the obtained accuracy. In this method detector resolution was found to have little or no effect on the results of quantitative analysis. The effect of the concentration of water was investigated as well, and it was found to have little influence on the results.

Linear gyrokinetic simulations of reversed shear Alfvén eigenmodes and ion temperature gradient modes in DIII-D tokamak

“…) has a growth rate of g = ´-5.23 10 s 20 20 The RSAE and ITG growth rates decrease for higher n modes due to the finite Larmor radius effects of the fast ions and thermal ions, respectively.…”

“…Toward such an integrated simulation of EP coupling with thermal particles, we have initiated comprehensive simulations of turbulent transport by low frequency electromagnetic instabilities (including AE and microturbulence) in a reversed shear geometry of DIII-D tokamak with fast ions [17] by using the gyrokinetic toroidal code (GTC) [18]. GTC has been extensively verified and validated for global simulations of AE [13][14][15][16]19] and microturbulence [11,18,[20][21][22]. As the first step in the integrated simulations of EP, we study the linear properties of these electromagnetic instabilities, which could provide a foundation for the next step of nonlinear simulations of multiple physical processes.…”

Exploratory studies on total reflection X-ray fluorescence spectrometry combined with slurry sampling for the multi-element analysis of copper-nickel sulfide ore

“…On the other hand, TXRF quantitative analysis differs from XRF where it does not necessitate calibration with certied reference materials (CRMs). [8][9][10] The simultaneous quantitative analysis of multiple elements can be effectively achieved through the internal standard (IS) method, which can streamline the process of elemental quantitative analysis, and allows for achieving an intensity that remains unaffected by the particle size, sample thickness, or glancing angle. 11 The selection of internal standard elements must be in accordance with the following characteristics: the element should be absent or present in trace amounts in the analyte, and must not interfere with the analysis of other elements.…”

Improvement of PLS regression‐based XRF spectroscopy quantification using multiple step procedure and Monte Carlo simulation

“…The biggest problem in the use of PLS regression as a quantification technique is the choice of the concentration range in the training set. Previous works in this field were focused on the feasibility of this technique. Training spectra were built according to the analyte concentration range in the samples to be measured.…”