Results 211 to 220 of about 6,902 (265)

Surface reflectance and pXRF for assessing soil weathering indexes

Journal of South American Earth Sciences, 2022
The use of satellite images is a widespread technique for estimating soil attributes. However, what is the potential of satellite data on the prediction of soil weathering indices? How much in their performance is affected by spectral mixing and data resolution? There is no consensus for answering these questions.
Souza, Arnaldo Barros e, Di Raimo, Luis Augusto Di Loreto, Mello, Danilo César de, Guimarães, Clecia Cristina B., Urbina-Salazar, Diego F., Silva, Sérgio Henrique Godinho, Curi, Nilton, Demattê, José A. M.   +7 more
openaire   +2 more sources

Optimizing pXRF sample preparation for in situ soil screening: A regulatory framework perspective.

Journal of Environmental Quality
This study evaluates the impact of sample preparation methods on the accuracy and precision of portable X-ray fluorescence (pXRF) measurements for trace metals in urban soils in Hartford, CT, in the context of residential regulatory thresholds.
Hayley Clos, Marisa Chrysochoou
semanticscholar   +1 more source

Non-destructive pXRF of mafic stone tools

Journal of Archaeological Science, 2012
Abstract Archaeological use of non-destructive pXRF has been most systematically applied to the classification and provenancing of volcanic glass (obsidian) artefacts. Comparable work has yet to be developed for non-vitreous artefacts. We report results of pXRF analysis for a sample of grey to black (mafic) aboriginal hatchets from Sydney and ...
Grave, Peter, Attenbrow, Val, Sutherland, Lin (R13165), Pogson, Ross E., Forster, Nicola   +4 more
openaire   +2 more sources

Characterization of New Zealand obsidian using PXRF

Journal of Archaeological Science, 2011
Abstract New Zealand has some of the most active areas of rhyolitic volcanism in the world and this has produced numerous obsidian sources in the northern half of the North Island. In total archaeologists have recognized 27 named locations from which obsidian can be obtained scattered across 4 geological source regions.
Sheppard, Peter J, Irwin, Geoff J, Lin, Sam C, Mccaffrey, Cameron P   +3 more
openaire   +2 more sources

Non-Invasive Mobile Raman and pXRF Analysis of Armorial Porcelain with the Coat of Arms of Louis XV and Others Enamelled in Canton: Analytical Criteria for Authentication

The Heritage
Nine glazed porcelain artifacts bearing the coat of arms of France, from King Louis XV tableware orders, were analysed at the laboratory or in their conservation secure room.
Philippe Colomban, Gulsu Simsek Franci, X. Gallet   +2 more
semanticscholar   +1 more source

Sourcing without sources: Measuring ceramic variability with pXRF

Journal of Archaeological Science: Reports, 2018
Abstract Sourcing studies usually focus on interpreting movement from source to place of deposition. These studies typically use materials like obsidian that lend themselves to chemical characterization. Less attention has been paid to sourcing materials that are also abundant in the archaeological record such as ceramics.
Joshua J. Emmitt, Andrew J. McAlister, Rebecca S. Phillipps, Simon J. Holdaway   +3 more
openaire   +2 more sources

True versus forged in the cultural heritage materials: the role of PXRF analysis

X-Ray Spectrometry, 2013
Forensic and cultural heritage scientific analyses have several similarities. Indeed, they both deal with unique, ‘precious’ and often quantitatively very limited objects, which have to be preserved as much as possible. Whenever analytical examination is needed, similar requirements have to be met.
GALLI, ANNA, Bonizzoni, L.
openaire   +4 more sources

Advancing the Application of pXRF for Biological Samples

Abstract Point 1: Portable x-ray fluorescent (pXRF) technology provides significant opportunities for rapid, non-destructive data collection in a range of fields of study. However, there are sources of variation and sample assumptions that may influence the data obtained, particularly in biological samples.
K.J. Brandis, R. Francis, K.J.A. Zawada, C.D. Hasselerharm, D. Ramp   +4 more
openaire   +1 more source

pXRF in tropical soils: Methodology, applications, achievements and challenges

2021
Abstract Proximal sensors have been increasingly used for a variety of purposes worldwide, with great interest on portable X-ray fluorescence (pXRF) spectrometry applications in Soil Science. pXRF provides rapid, inexpensive, non-destructive, and environmentally-friendly elemental analysis in soils, rocks, sediments, plant tissues, water, and other ...
openaire   +1 more source

The application of pXRF for the chemical and mineralogical characterization of heavy mineral sands

Geochemistry: Exploration, Environment, Analysis, 2019
Heavy mineral sands (HMS) are a resource of Ti minerals, zircon, monazite and critical elements such as Hf and the rare earth elements (REE). Portable field techniques capable of measuring the geochemical composition, such as portable XRF (pXRF), may assist in identifying and quantifying the multiple minerals present in HMS. In this study,
D. Gallhofer, B. G. Lottermoser
openaire   +1 more source