Velkoplošné mapování rozmanitých struktur žuly metodami laserové ablace, výzkumná studie

Mapping of different structures on large area of garnite sample using laser-ablation based analytical techniques, an exploratory study

článek v časopise - ostatní, Jost

en

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 x 100 individual sample points to map an area of 20 x 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.

Metody založené na laserové ablaci nabízí snadné využití pro rychlou chemickou analýzu různých materiálů. V této výzkumné studii bylo multiprvkové (Ca, Al, Fe, Mn) mapování povrchu vzorku žuly provedeno metodami spektrometrie laserem buzeného plazmatu (LIBS) a následně laserovou ablací ve spojení s hmotnostní spektrometrií indukčně vázaného plazmatu (LA-ICP-MS). Parametry ablace (energie laserového pulzu, velikost kráteru) byly optimalizovány pro obě techniky pro dosažení vhodných podmínek pro dvoudimensionální mapování minerálních mikrostruktur na velké ploše s vysokým prostorovým rozlišením.

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 x 100 individual sample points to map an area of 20 x 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.

LIBS; LA-ICP-MS; Geological samples; Spatially-resolved analysis; Compositional mapping

2008

01.10.2008

Elsevier Science

Amsterdam, Nizozemsko

0584-8547

Spectrochimica Acta Part B

62B

10

1139–1144

6