Studium prvkové distribuce v kalcifikovaných tkáních pomocí spektroskopie laserem buzeného plazmatu a laserové ablace ve spojení s hmotnostní spektrometrií indukčně vázaného plazmatu

Study of Elemental Distribution in Calcified Tissues by Laser-Induced Breakdown Spectroscopy and Laser Ablation Inductively Coupled Plasma Mass Spectrometry

abstrakt

en

Spatial mapping of elements in calcified tissues offers a wide range of applications, mainly in archeology, zoology, paleontology, medicine, biology or environmental monitoring. Especially teeth provide almost permanent and chronological record of the nutritional status of an individual and anthropological issue of trace elements in the course of development. Teeth may therefore provide an excellent bioarchive related to diet and migration. Laser-Induced Breakdown Spectroscopy (LIBS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) proved to be suitable analytical methods for spatial mapping of matrix elements (Ca, P). We have investigated the applicability of these two techniques for the mapping of trace elements (Sr, Zn, Ba, Pb) distribution on a set of archaeological finds of animal and human teeth samples. Here we report on some outcomes from these investigations. From the distribution of trace elements and their ratios we could deduce e.g. the type of consumed food (carnivore or herbivore). The accumulation of lead from external sources in human teeth may reflect an access of the individual to the civilizational achievements of that time.

Mapování prostorového rozložení prvků v kalcifikovaných tkáních nabízí širokou škálu využití hlavně archeologii, zoologii, paleontologii, medicíně, biologii a monitoringu životního prostředí. Především zuby poskytují téměř trvalý chronologický záznam nesoucí informaci o potravě během růstu jedince. Z těchto informací je rovněž usuzovat na migraci. Spektroskopie laserem buzeného plazmatu (LIBS) a laserová ablace ve spojení s hmotnostní spektrometrií indukčně vázaného plazmatu (LA-ICP-MS) jsou vhodné techniky pro prostorové mapování jak matričních prvků tak prvků minoritních a stopových. Bylo studována možnost využití těchto technik pro mapování stopových prvků (Sr, Zn, Ba, Pb) na souboru archeologických vzorků zvířecích a lidských zubů.

Spatial mapping of elements in calcified tissues offers a wide range of applications, mainly in archeology, zoology, paleontology, medicine, biology or environmental monitoring. Especially teeth provide almost permanent and chronological record of the nutritional status of an individual and anthropological issue of trace elements in the course of development. Teeth may therefore provide an excellent bioarchive related to diet and migration. Laser-Induced Breakdown Spectroscopy (LIBS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) proved to be suitable analytical methods for spatial mapping of matrix elements (Ca, P). We have investigated the applicability of these two techniques for the mapping of trace elements (Sr, Zn, Ba, Pb) distribution on a set of archaeological finds of animal and human teeth samples. Here we report on some outcomes from these investigations. From the distribution of trace elements and their ratios we could deduce e.g. the type of consumed food (carnivore or herbivore). The accumulation of lead from external sources in human teeth may reflect an access of the individual to the civilizational achievements of that time.

LIBS; Laser ablation; Inductively coupled plasma mass spectrometry; LA ICP MS

18.07.2011

100–101

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