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Showing 1 to 20 of 24 for “"pxrf"”.
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Vývoj inovativní prekoncentrační metody agar-pXRF pro mobilní analýzu rizikových prvků v životním prostředí
… přenosného rentgenofluorescenčního analyzátoru (pXRF). Byla studována výtěžnost prekoncentrace v závislosti na množství použitého agarového prášku a vliv pH na prekoncentrační faktor jednotlivých prvků. Byly experimentálně stanoveny hodnoty prekoncentračních faktorů pro každý prvek. Dále byly …
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Characterization of soils via portable X-ray fluorescence spectrometer
… modification. Portable x-ray fluorescence (PXRF) spectrometry is a proximal sensing technique which provides elemental data in-situ, in seconds. This study examined the potential of using PXRF for soil pH and CEC prediction, using a diverse set of soil samples. The use of PXRF spectrometry …
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The Application of Machine Learning Methods to Portable X-Ray Fluorescence Data: A Case Study from Zwartfontein Farm, Northern Limb of the Bushveld Complex, South Africa
… transform low-cost portable X-ray fluorescence (pXRF) data into interpretable geological information. The development of methods was tested, as a case study, on the Northern Limb of the Bushveld Complex of South Africa – a complex multi-commodity deposit (Ni-Cu-(Co)-PGE) comprising intricately …
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Pilot Study using Elemental Geochemistry as a Means of Discriminating Chert Stratigraphy in the Roberts Mountains Allochthon, Nevada
… The methods used are a handheld Niton XRF (pXRF) on hand samples, ICP-OES to determine percent oxide concentrations, and ICP-MS for trace element concentrations. Data were analyzed using multivariate linear discriminant analysis (LDA) to develop a classification model on known samples, and …
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Using Portable X-ray Fluorescence to Predict Physical and Chemical Properties of California Soils
… as portable X-ray fluorescence spectrometry (pXRF). pXRF analyzers use high energy Xrays that interact with a sample to cause characteristic reflorescence that can be distinguished by the analyzer for its energy and intensity to determine the chemical composition of the sample. While pXRF only …
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Identity in the Late Woodland Northeast: interpreting communities of practice from paste composition at the Thomas/Luckey and the Losey 3 sites
… and paste was answered by analyzing sherds with pXRF. While pottery types are based on visual attributes, pXRF looks at elemental composition. Decoration is mimicable, but paste is not; paste accurately illustrates a vessel’s origin. Cultural groups are not static entities, and internal …
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Measuring Trace Element Concentrations in Artiodactyl Cannonbones using Portable X-Ray Fluorescence
… technique using portable X-ray fluorescence (pXRF) to measure trace element concentrations in comparative collection and archaeological bone samples. Using cannonbones from five different artiodactyl species, I collected trace element data from 50 comparative collection specimens and 18 …
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Pining for an anomaly: Biogeochemical mapping of the Cobar Basin for mineral exploration at regional to local scales.
… and portable X-ray fluorescence spectrometry (pXRF). Concentrations of most elements in the needles reflect variations in underlying lithology, even in areas with alluvial cover. Concentrations of non-nutrient trace elements Au, Ag, Bi, Pb, As and W are typically higher over Siluro-Devonian …
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The Origins and Development of the Verwood-Type Pottery Industry
… microscopic and chemical analyses via pXRF, supplemented by field examinations of postulated pre-1600 production sites, to clarify the origins of Dorset’s most prolific post-medieval coarseware industry - commonly known as the Verwood-type pottery industry. This study charts the …
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Chetumal's Dragonglass: Postclassic Obsidian Production and Exchange at Santa Rita Corozal, Belize
… of the lithic technology approach and the use of pXRF (portable X-ray fluorescence) spectrometry, it is possible to establish the sources of obsidian being exploited, the stage of reduction of obsidian imports, the major obsidian industry, and obsidian distribution for Santa Rita Corozal's …
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Raw Material Usage and Stone Tool Manufacture in the Elwha River Valley
… was collected with a portable X-ray florescent (pXRF) spectrometry. Fine-grained volcanic stone appears in sparsely in geologic deposit but exists in over 79 percent of the total artifact assemblage and in all forms of stone tool reduction sequences. Assemblages exhibit similar characteristics to …
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Recovering Lost Information From Avocational Projectile Point Collections
… The results of portable X-ray fluorescence (pXRF) analysis identified 62 obsidian sources from the northwest Great Basin, although it was dominated by Beatys Butte obsidian. Many morphological, typological, and sourcing characteristics of the Wild/Clymer Collection sample are consistent with …
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Mobile Practices and the Production and Curation of Pottery: A View from the Ancient Southern Russian Steppe Using Portable Methods of Investigation
… microscopy and portable x-ray fluorescence (pXRF). These practices were considered technical choices indicative of “communities of practice” formed within social networks constructed through routine mobility. While in globalized contexts one may expect the diversification of everyday practice …
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Building Roman Britons The Use of Novel Construction Materials in the Development of Roman Bath
… portable energy-dispersive X-Ray fluorescence (pXRF) in order to suggest provenance. These analyses yielded significant results when integrated with regional research. At the site level, two major phases of construction at the Roman Baths have been found to be supplied by the Minety kiln site. …
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Recognising cryptic alteration surrounding the Mount Isa Copper Deposits: Implications for controls on fluid flow, and mineral exploration
… system. Portable X-Ray Fluorescence (pXRF) represents a tool that can be used in a more targeted approach during exploration activities. With rigorous quality assurance and control procedures, pXRF can quickly and cost-effectively collect large datasets to identify broad trends across …
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The Compilation of a British Lowland Heathland and Agricultural Grassland Phytolith Reference Database and its application at the archaeological site of Wytch Farm, Poole Harbour, Dorset
… analyses using portable x-ray spectroscopy (pXRF), magnetic susceptibility, soil pH and loss on ignition. The combined analysis has led to methodological observations on the extraction of phytoliths from British native plants and an interpretation of the Wytch Farm soil deposits and …
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Understanding the selection and co-existence of tin bronze alloying techniques in Antiquity. An experimental and archaeological approach with Northeast Iberia as case study (2800-200BC).
… of these collections were analysed using pXRF, OM, SEM-EDS, and LIA to characterise technological choices through time. These choices were considered in relation to their performance characteristics, and subsequently contextualised within the relevant environmental and socio-economic …
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Social Transformations and Ceramic Production during the 4th millennium BCE in the Shahrizor Plain and Bazyan Valley, Iraqi Kurdistan. A Geochemical and Petrographic Study.
… to investigate provenance which I couple with pXRF for bulk ceramic composition, and to compliment the petrographic study. FTIR enables examination of pottery firing temperature. This PhD provides new insights into the Uruk Phenomenon’s transmission. I demonstrate variable local responses to a …
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Technological Systems of Small Point Weaponry of the Postclassic Lowland Maya (A.D. 1400 - 1697)
… methods including portable x-ray fluorescence (pXRF) and cross-over immuno-electrophoresis (CIEP) are used to identify raw material procurement patterns and interpret use activities related to the bow-and-arrow. The results of this study demonstrate that raw material preference and procurement …
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Production and Consumption of Middle Islamic Ceramics (1000-1500 CE) in Western Asia: Regional Practices in an Interconnected World
… petrography, portable X-Ray fluorescence (pXRF), and Fourier Transform Infrared Spectroscopy (FT-IR). These analyses are specifically selected to establish the potential provenience of the ceramics, reconstruct technical choices and social practices, and characterize production and …
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