Mapping of different structures on large area of granite sample using laser-ablation based analytical techniques,an exploratory study |
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Authors: | K Novotný J Kaiser M Galiová V Konečná J Novotný R Malina M Liška V Kanický V Otruba |
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Institution: | 1. Laboratory of Atomic Spectrochemistry, Department of Chemistry, Faculty of Science, Masaryk University, Kotlá?ská 2, 611 37 Brno, Czech Republic;2. Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic |
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Abstract: | Laser-ablation based analytical techniques represent a simple way for fast chemical analysis of different materials. In this work, an exploratory study of multi-element (Ca, Al, Fe, Mn) mappings of a granite sample surface was performed by laser-induced breakdown spectroscopy (LIBS) and subsequently by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis. The operating parameters (e.g. pulse energy, ablation-crater size) were optimized for both techniques in order to achieve the appropriate conditions for two-dimensional high-resolution compositional mappings of mineral microstructures in large sample areas. The sample was scanned with 100 × 100 individual sample points to map an area of 20 × 20 mm2. The normalized signals were used for construct of contour plots which were colored according local distribution of the selected elements. The results of two laser-based methods were compared and found to be similar. |
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Keywords: | LIBS LA-ICP-MS Geological samples Spatially-resolved analysis Compositional mapping |
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