Np(IV)/Np(V) valence determinations from Np L3 edge XANES/EXAFS

Melissa A. Denecke; Kathy Dardenne; Christian M. Marquardt

doi:10.1016/j.talanta.2004.08.034

Np(IV)/Np(V) valence determinations from Np L3 edge XANES/EXAFS

Melissa A. Denecke, Kathy Dardenne, Christian M. Marquardt

Dalton Nuclear Institute

Research output: Contribution to journal › Article › peer-review

Abstract

X-ray absorption near edge structure (XANES) spectroscopy for in situ metal valence determination has become a powerful analytical tool in heterogeneous systems. This is in part because it is applicable without prior separation procedures. For some systems, however, determining the oxidation state from XANES spectra is not straightforward and caution must be used. We show that the analysis of L3,2 edge EXAFS (extended X-ray absorption fine structure) spectra is better suited to distinguish between Np(IV) and Np(V) than from their XANES spectra. Whereas evidence for the oxidation of Np(IV) in solution samples from their Np L3 XANES is unclear, their EXAFS data unequivocally reveals Np(V) formation in the solutions. © 2004 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	1008-1014
Number of pages	6
Journal	Talanta
Volume	65
Issue number	4
DOIs	https://doi.org/10.1016/j.talanta.2004.08.034
Publication status	Published - 28 Feb 2005

Keywords

EXAFS
Np
Valence determination
XANES

Research Beacons, Institutes and Platforms

Dalton Nuclear Institute

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10.1016/j.talanta.2004.08.034

http://www.sciencedirect.com/science/article/pii/S003991400400517X

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title = "Np(IV)/Np(V) valence determinations from Np L3 edge XANES/EXAFS",

abstract = "X-ray absorption near edge structure (XANES) spectroscopy for in situ metal valence determination has become a powerful analytical tool in heterogeneous systems. This is in part because it is applicable without prior separation procedures. For some systems, however, determining the oxidation state from XANES spectra is not straightforward and caution must be used. We show that the analysis of L3,2 edge EXAFS (extended X-ray absorption fine structure) spectra is better suited to distinguish between Np(IV) and Np(V) than from their XANES spectra. Whereas evidence for the oxidation of Np(IV) in solution samples from their Np L3 XANES is unclear, their EXAFS data unequivocally reveals Np(V) formation in the solutions. {\textcopyright} 2004 Elsevier B.V. All rights reserved.",

keywords = "EXAFS, Np, Valence determination, XANES",

author = "Denecke, {Melissa A.} and Kathy Dardenne and Marquardt, {Christian M.}",

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doi = "10.1016/j.talanta.2004.08.034",

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journal = "Talanta",

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TY - JOUR

T1 - Np(IV)/Np(V) valence determinations from Np L3 edge XANES/EXAFS

AU - Denecke, Melissa A.

AU - Dardenne, Kathy

AU - Marquardt, Christian M.

PY - 2005/2/28

Y1 - 2005/2/28

N2 - X-ray absorption near edge structure (XANES) spectroscopy for in situ metal valence determination has become a powerful analytical tool in heterogeneous systems. This is in part because it is applicable without prior separation procedures. For some systems, however, determining the oxidation state from XANES spectra is not straightforward and caution must be used. We show that the analysis of L3,2 edge EXAFS (extended X-ray absorption fine structure) spectra is better suited to distinguish between Np(IV) and Np(V) than from their XANES spectra. Whereas evidence for the oxidation of Np(IV) in solution samples from their Np L3 XANES is unclear, their EXAFS data unequivocally reveals Np(V) formation in the solutions. © 2004 Elsevier B.V. All rights reserved.

AB - X-ray absorption near edge structure (XANES) spectroscopy for in situ metal valence determination has become a powerful analytical tool in heterogeneous systems. This is in part because it is applicable without prior separation procedures. For some systems, however, determining the oxidation state from XANES spectra is not straightforward and caution must be used. We show that the analysis of L3,2 edge EXAFS (extended X-ray absorption fine structure) spectra is better suited to distinguish between Np(IV) and Np(V) than from their XANES spectra. Whereas evidence for the oxidation of Np(IV) in solution samples from their Np L3 XANES is unclear, their EXAFS data unequivocally reveals Np(V) formation in the solutions. © 2004 Elsevier B.V. All rights reserved.

KW - EXAFS

KW - Np

KW - Valence determination

KW - XANES

U2 - 10.1016/j.talanta.2004.08.034

DO - 10.1016/j.talanta.2004.08.034

M3 - Article

SN - 0039-9140

VL - 65

SP - 1008

EP - 1014

JO - Talanta

JF - Talanta

IS - 4

ER -

Np(IV)/Np(V) valence determinations from Np L3 edge XANES/EXAFS

Abstract

Keywords

Research Beacons, Institutes and Platforms

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