Phosphorus L(2,3)-edge XANES: overview of reference compounds.
Synchrotron-based X-ray absorption near-edge structure (XANES) spectroscopy is becoming an increasingly used tool for the element speciation in complex samples. For phosphorus (P) almost all XANES measurements have been carried out at the K-edge. The small number of distinctive features at the P K-edge makes in some cases the identification of different P forms difficult or impossible. As indicated by a few previous studies, the P L(2,3)-edge spectra were richer in spectral features than those of the P K-edge. However, experimentally consistent spectra of a wide range of reference compounds have not been published so far. In this study a library of spectral features is presented for a number of mineral P, organic P and P-bearing minerals for fingerprinting identification. Furthermore, the effect of radiation damage is shown for three compounds and measures are proposed to reduce it. The spectra library provided lays a basis for the identification of individual P forms in samples of unknown composition for a variety of scientific areas.
Kruse
Jens
J
University of Rostock, Institute for Land Use, 18059 Rostock, Germany. jens.kruse@uni-rostock.de
Leinweber
Peter
P
Eckhardt
Kai Uwe
KU
Godlinski
Frauke
F
Hu
Yongfeng
Y
Zuin
Lucia
L
D038622:Internationality; D010758:Phosphorus / Q000737:chemistry* / Q000592:standards*; D012016:Reference Values; D013052:Spectrometry, X-Ray Emission / Q000592:standards*; D017356:Synchrotrons / Q000592:standards*
D010758:Phosphorus