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PORIZKA, P. DEMIDOV, A. KAISER, J. KEIVANIAN, J. GORNUSHKIN, I. PANNE, U. RIEDEL, J.
Originální název
Laser-Induced Breakdown Spectroscopy for in-situ Qualitative and Quantitative Analysis of Mineral Ores
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
In this work, the potential of Laser-Induced Breakdown Spectroscopy (LIBS) for discrimination and analysis of geological materials was examined. The research was focused on classification of mineral ores using their LIBS spectra prior to quantitative determination of copper. Quantitative analysis is not a trivial task in LIBS measurement because intensities of emission lines in laser-induced plasmas (LIP) are strongly affected by the mineral matrix (matrix effect). To circumvent this effect, typically matrix matched standards are used to obtain matrix dependent calibration curves. If the sample set consists of a mixture of different matrices, even in this approach, the corresponding matrix has to be known prior to the downstream data analysis. For this categorization, the multielemental character of LIBS spectra can be of help. In this contribution, a principal component analysis (PCA) was employed on the measured data set to discriminate individual rocks as individual matrices against each other according to their overall elemental composition. 27 igneous rock samples were analyzed in the form of fine dust, classified and subsequently quantitatively analyzed. Two different LIBS setups in two laboratories were used to prove the reproducibility of classification and quantification. A superposition of partial calibration plots constructed from the individual clustered data displayed a large improvement in precision and accuracy compared to the calibration plot constructed from all ore samples. The classification of mineral samples with complex matrices can thus be recommended prior to calibration analysis.
Klíčová slova
Laser-induced breakdown spectroscopy; LIBS; Chemometrics; Principal Component Analysis; geochemical analysis
Autoři
PORIZKA, P.; DEMIDOV, A.; KAISER, J.; KEIVANIAN, J.; GORNUSHKIN, I.; PANNE, U.; RIEDEL, J.
Rok RIV
2014
Vydáno
1. 11. 2014
ISSN
0584-8547
Periodikum
Spectrochimica Acta Part B
Ročník
101
Číslo
11
Stát
Spojené království Velké Británie a Severního Irska
Strany od
155
Strany do
163
Strany počet
9
URL
http://www.sciencedirect.com/science/article/pii/S058485471400202X
BibTex
@article{BUT109060, author="PORIZKA, P. and DEMIDOV, A. and KAISER, J. and KEIVANIAN, J. and GORNUSHKIN, I. and PANNE, U. and RIEDEL, J.", title="Laser-Induced Breakdown Spectroscopy for in-situ Qualitative and Quantitative Analysis of Mineral Ores", journal="Spectrochimica Acta Part B", year="2014", volume="101", number="11", pages="155--163", doi="10.1016/j.sab.2014.08.027", issn="0584-8547", url="http://www.sciencedirect.com/science/article/pii/S058485471400202X" }