Quick X-ray absorption spectroscopy for determining metal speciation in environmental samples

Jean François Gaillard*, Samuel M. Webb, John P.G. Quintana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We present a method tor 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 tine 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.

Original languageEnglish (US)
Pages (from-to)928-930
Number of pages3
JournalJournal of Synchrotron Radiation
Volume8
Issue number2
DOIs
StatePublished - Mar 1 2001

Keywords

  • Environmental
  • Metal Speciation
  • Q-XAS
  • Spectral Decomposition

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Instrumentation

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