Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis

LI Da-yong; ZHU Zhi-xiong; LI Jing; WANG Liang

doi:10.15898/j.cnki.11-2131/td.201903080034

Rock and Mineral Analysis > 2020 > 39(1): 135-142. > DOI: 10.15898/j.cnki.11-2131/td.201903080034

LI Da-yong, ZHU Zhi-xiong, LI Jing, WANG Liang. Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis[J]. Rock and Mineral Analysis, 2020, 39(1): 135-142. DOI: 10.15898/j.cnki.11-2131/td.201903080034

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Accuracy Research of Minerals with High Loss of Ignition during X-ray Fluorescence Spectrometry Semi-quantitative Analysis

Guizhou Central Laboratory of Geology and Mineral Resources, Guiyang 550018, China

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Received Date: March 07, 2019
Revised Date: July 04, 2019
Accepted Date: July 15, 2019
Published Date: December 31, 2019

Abstract

HIGHLIGHTS
(1) A calibration mode combined chemical quantitative analysis with X-ray fluorescence spectrometry semi-quantitative analysis was proposed.

(2) The average accuracy of multi-element in bauxite, carbonate minerals and sulfide metal minerals was increased by 2.6 to 4.5 times using this calibration mode.

(3) This method can be used to quickly determine multi-element in minerals with high loss of ignition.

ABSTRACT

BACKGROUNDThe SQX, X-ray fluorescence spectrometry semi-quantitative analysis software, was used to analyze an unknown sample. The software can analyze the range of ⁹F-⁹²U elements, but cannot directly analyze the parameters such as H₂O and C. Employing the balanced normalized calculation to test a special sample, such as bauxite with high loss of ignition and high crystalliferous water content, carbonate minerals with higher CO₂ content, sulfide metal minerals with higher sulfur and carbon content, the analysis results for main elements like Al₂O₃, SiO₂, CaO, MgO and Fe are largely affected by undetermined parameters resulting in low accuracy of semi-quantitative analysis data.
OBJECTIVESTo propose a new calibration mode through experimental research.
METHODSThe calibration mode quantitatively and selectively analyzes the parameters such as loss of ignition, crystalliferous water, carbon dioxide and sulfur of an unknown sample, based on the preliminary results of semi-quantitative analysis. By putting the quantitative analysis result into SQX, the new semi-quantitative analysis results were obtained by using the second equilibrium normalization calculation.
RESULTSThe experimental results show that the average accuracy of multi-element in bauxite, carbonate minerals and sulfide metal minerals was increased by 2.6 to 4.5 times using this calibration mode.
CONCLUSIONSThe method can quickly and accurately determine multi-element in minerals with high loss of ignition, including bauxite, carbonate minerals, and sulfide metal minerals.
- bauxite,
- carbonate minerals,
- sulfide metal ore,
- X-ray fluorescence spectrometry,
- semi-quantitation

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