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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1107/S1600577521008857
|2 doi
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|a pubmed25n1109.xml
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|a (DE-627)NLM332770230
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|a (NLM)34738934
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Carlomagno, Ilaria
|e verfasserin
|4 aut
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|a Trace-element XAFS sensitivity
|b a stress test for a new XRF multi-detector
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 09.11.2021
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|a Date Revised 04.04.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a open access.
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|a X-ray absorption fine-structure (XAFS) spectroscopy can assess the chemical speciation of the elements providing their coordination and oxidation state, information generally hidden to other techniques. In the case of trace elements, achieving a good quality XAFS signal poses several challenges, as it requires high photon flux, counting statistics and detector linearity. Here, a new multi-element X-ray fluorescence detector is presented, specifically designed to probe the chemical speciation of trace 3d elements down to the p.p.m. range. The potentialities of the detector are presented through a case study: the speciation of ultra-diluted elements (Fe, Mn and Cr) in geological rocks from a calcareous formation related to the dispersal processes from Ontong (Java) volcanism (mid-Cretaceous). Trace-elements speciation is crucial in evaluating the impact of geogenic and anthropogenic harmful metals on the environment, and to evaluate the risks to human health and ecosystems. These results show that the new detector is suitable for collecting spectra of 3d elements in trace amounts in a calcareous matrix. The data quality is high enough that quantitative data analysis could be performed to determine their chemical speciation
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|a Journal Article
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|a X-ray absorption spectroscopy
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|a X-ray fluorescence
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|a fluorescence detector
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|a geology
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|a Metals
|2 NLM
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|a Trace Elements
|2 NLM
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|a Antonelli, Matias
|e verfasserin
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|a Aquilanti, Giuliana
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|a Bellutti, Pierluigi
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|a Bertuccio, Giuseppe
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|a Borghi, Giacomo
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|a Cautero, Giuseppe
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|a Cirrincione, Daniela
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|a de Giudici, Giovanni
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|a Ficorella, Francesco
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|a Gandola, Massimo
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|a Giuressi, Dario
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|a Medas, Daniela
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|a Mele, Filippo
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|a Menk, Ralf H
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|a Olivi, Luca
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|a Orzan, Giulio
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|a Picciotto, Antonino
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|a Podda, Francesca
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|a Rachevski, Alexandre
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|a Rashevskaya, Irina
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|a Stebel, Luigi
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|a Vacchi, Andrea
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|a Zampa, Gianluigi
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|a Zampa, Nicola
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|a Zorzi, Nicola
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|a Meneghini, Carlo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of synchrotron radiation
|d 1994
|g 28(2021), Pt 6 vom: 01. Nov., Seite 1811-1819
|w (DE-627)NLM09824129X
|x 1600-5775
|7 nnas
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| 773 |
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|g volume:28
|g year:2021
|g number:Pt 6
|g day:01
|g month:11
|g pages:1811-1819
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|u http://dx.doi.org/10.1107/S1600577521008857
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|d 28
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