Evaluation in the Application of Multi-instrument Synergy X-ray Fluorescence Spectrometry in a Regional Geochemical Survey

Yong-li FU; Wen-cui CHENG; Zhao-fa ZHANG; Li WEI; Meng-hua SUN; Xue-min PANG

doi:10.15898/j.cnki.11-2131/td.201703070028

Rock and Mineral Analysis > 2017 > 36(5): 495-500. > DOI: 10.15898/j.cnki.11-2131/td.201703070028

Yong-li FU, Wen-cui CHENG, Zhao-fa ZHANG, Li WEI, Meng-hua SUN, Xue-min PANG. Evaluation in the Application of Multi-instrument Synergy X-ray Fluorescence Spectrometry in a Regional Geochemical Survey[J]. Rock and Mineral Analysis, 2017, 36(5): 495-500. DOI: 10.15898/j.cnki.11-2131/td.201703070028

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Evaluation in the Application of Multi-instrument Synergy X-ray Fluorescence Spectrometry in a Regional Geochemical Survey

Hebei Province Geological and Mineral Center Laboratory, Baoding 071051, China

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Received Date: March 06, 2017
Revised Date: July 06, 2017
Accepted Date: August 13, 2017
Published Date: August 31, 2017

Abstract

Highlights
· By designing the XRF data handler, the measurement data sharing and unified processing is realized.

· The interference on XRF data caused by the matrix effects and spectral line overlap is corrected using the data of analytical results obtained from ICP-OES, ICP-MS and AFS.

· The scheme substantially improves the analysis speed of XRF, and achieves the coordinated measurement of multi-instruments.

ABSTRACT

Multi-element analysis of a regional geochemical survey sample usually involves X-ray Fluorescence Spectrometry (XRF), Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES), Inductively Coupled Plasma-Mass Spectrometry (ICP-MS), Atomic Fluorescence Spectrometry (AFS) and other instruments. Because there are more than 20 elements determined by XRF, the detection speed of XRF is not synchronous with other instruments, which influences the overall progress of the project. The matching scheme is optimized, and the analysis method of XRF for part of the elements is adjusted in this study. The data of Na₂O, MgO and V involved in matrix correction and spectral overlap correction are measured by ICP-OES. The data of Cu, Pb, Zn, Mn, and Th were measured by ICP-MS. As and Bi data were measured by AFS. The optimized XRF method reduces the number of elements to 16, namely SiO₂, Al₂O₃, CaO, Fe₂O₃, K₂O, Ti, P, Sr, Ba, Zr, Nb, Y, Rb, Br, Ga and Cl. Through the designed XRF data reduction program, the data sharing of different analysis methods is realized, and the influence of XRF data caused by matrix effects and spectral line overlap is corrected using the data from XRF, ICP-OES, ICP-MS and AFS. The precision of this method (RSD, n=12) is 0.55%-8.22%, and the accuracies (△logC) are 0-.0.031. The method is validated by determination of national standard reference materials and actual samples. The results meet the quality requirements for a regional geochemical survey. This scheme reduces the number of elements directly measured by XRF, and improves the analysis efficiency of various collaborative instruments.
- regional geochemical survey analysis,
- multi-instruments coordination,
- X-ray Fluorescence Spectrometry,
- matrix effect

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References (14)

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Evaluation in the Application of Multi-instrument Synergy X-ray Fluorescence Spectrometry in a Regional Geochemical Survey