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Titolo:
Quick X-ray absorption spectroscopy for determining metal speciation in environmental samples
Autore:
Gaillard, JF; Webb, SM; Quintana, JPG;
Indirizzi:
Northwestern Univ, Dept Civil Engn, Evanston, IL 60208 USA Northwestern Univ Evanston IL USA 60208 ivil Engn, Evanston, IL 60208 USA Northwestern Univ, DND CAT, Argonne, IL 60439 USA Northwestern Univ Argonne IL USA 60439 iv, DND CAT, Argonne, IL 60439 USA
Titolo Testata:
JOURNAL OF SYNCHROTRON RADIATION
, volume: 8, anno: 2001,
parte:, 2
pagine: 928 - 930
SICI:
0909-0495(200103)8:<928:QXASFD>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXTRACTION PROCEDURE; CONTAMINATED SOILS; ZINC SPECIATION; FINE-STRUCTURE; TRACE-METALS; EXAFS; LEAD; SEDIMENTS;
Keywords:
environmental; metal speciation; Q-XAS; spectral decomposition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Gaillard, JF Northwestern Univ, Dept Civil Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA Northwestern Univ 2145 Sheridan Rd Evanston IL USA 60208 USA
Citazione:
J.F. Gaillard et al., "Quick X-ray absorption spectroscopy for determining metal speciation in environmental samples", J SYNCHROTR, 8, 2001, pp. 928-930

Abstract

We present a method for determining the chemical speciation of metals in environmental particles based on Quick-X-ray Absorption Spectroscopy. The approach can be applied to either the extended or the near edge fine structure, and consists in the decomposition of the XAS spectrum of an unknown sample on a reference set of standards' spectra using quadratic linear programming. The analysis accounts for the statistical experimental errors generated during the acquisition of X-ray absorption data, and leads to error estimates on the various fractions determined via a Monte Carlo procedure. An application example is presented for the speciation of inorganic Zn in a contaminated sediment sample.

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Documento generato il 05/12/20 alle ore 01:56:21