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@article{1352282,
author = {Klus, Jakub and Mikysek, Petr and Prochazka, David and Pořízka, Pavel and Prochazková, Petra and Novotný, Jan and Trojek, Tomáš and Novotný, Karel and Slobodník, Marek and Kaiser, Jozef},
article_number = {September},
doi = {http://dx.doi.org/10.1016/j.sab.2016.08.014},
keywords = {LIBS; Uranium principal component analysis; Chemical mapping; Sandstone hosted deposit; X ray Fluorescence},
language = {eng},
issn = {0584-8547},
journal = {Spectrochimica Acta B},
title = {Multivariate approach to the chemical mapping of uranium in sandstone-hosted uranium ores analyzed using double pulse Laser-Induced Breakdown Spectroscopy},
url = {http://www.sciencedirect.com/science/article/pii/S058485471630146X},
volume = {123},
year = {2016}
}
TY - JOUR
ID - 1352282
AU - Klus, Jakub - Mikysek, Petr - Prochazka, David - Pořízka, Pavel - Prochazková, Petra - Novotný, Jan - Trojek, Tomáš - Novotný, Karel - Slobodník, Marek - Kaiser, Jozef
PY - 2016
TI - Multivariate approach to the chemical mapping of uranium in sandstone-hosted uranium ores analyzed using double pulse Laser-Induced Breakdown Spectroscopy
JF - Spectrochimica Acta B
VL - 123
IS - September
SP - 143-149
EP - 143-149
PB - Elsevier
SN - 05848547
KW - LIBS
KW - Uranium principal component analysis
KW - Chemical mapping
KW - Sandstone hosted deposit
KW - X ray Fluorescence
UR - http://www.sciencedirect.com/science/article/pii/S058485471630146X
L2 - http://www.sciencedirect.com/science/article/pii/S058485471630146X
N2 - This work is focused on the high resolution mapping of uranium in sandstone-hosted uranium ores using Laser-Induced Breakdown Spectroscopy technique. In order to obtain chemical image with highest possible spatial resolution, LIBS system in orthogonal double pulse arrangement was employed. Owing to this experimental arrangement the spot size of 50 um in diameter resulting in lateral resolution of 100 um was reached. Despite the increase in signal intensity in DP LIBS modification, the detection of uranium is challenging. The main cause is the high density of uranium spectral lines, which together with broadening of LIBS spectral lines overreaches the resolution of commonly used spectrometers. It results in increased overall background radiation with only few distinguishable uranium lines. Three different approaches in the LIBS data treatment for the uranium detection were utilized: i) spectral line intensity, ii) region of apparent background and iii) multivariate data analysis. By utilizing multivariate statistical methods, a specific specimen features (in our case uranium content) were revealed by processing complete spectral information obtained from broadband echelle spectrograph. Our results are in a good agreement with conventional approaches such as line fitting and show new possibilities of processing spectral data in mapping. As a reference technique to LIBS was employed X-ray Fluorescence. The XRF chemical images used in this paper have lower resolution (approximately 1–2 mm per image point), nevertheless the elemental distribution is apparent and corresponds to presented LIBS experiments.
ER -
KLUS, Jakub, Petr MIKYSEK, David PROCHAZKA, Pavel POŘÍZKA, Petra PROCHAZKOVÁ, Jan NOVOTNÝ, Tomáš TROJEK, Karel NOVOTNÝ, Marek SLOBODNÍK and Jozef KAISER. Multivariate approach to the chemical mapping of uranium in sandstone-hosted uranium ores analyzed using double pulse Laser-Induced Breakdown Spectroscopy. \textit{Spectrochimica Acta B}. Elsevier, vol.~123, September, p.~143-149. ISSN~0584-8547. doi:10.1016/j.sab.2016.08.014. 2016.
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