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Infrared characterization of environmental samples by pulsed photothermal spectroscopy

Published online by Cambridge University Press:  02 December 2003

W. Seidel ,
H. Foerstendorf ,
K. H. Heise ,
R. Nicolai ,
A. Schamlott ,
J. M. Ortega ,
F. Glotin  and
R. Prazeres
W. Seidel*
Affiliation:
Research Centre Rossendorf, Institute of Nuclear and Hadron Physics, PO 51 01 19, 01314 Dresden, Germany
H. Foerstendorf
Affiliation:
Research Centre Rossendorf, Institute of Radiochemistry, PO 51 01 19, 01314 Dresden, Germany
K. H. Heise
Affiliation:
Research Centre Rossendorf, Institute of Radiochemistry, PO 51 01 19, 01314 Dresden, Germany
R. Nicolai
Affiliation:
Research Centre Rossendorf, Institute of Radiochemistry, PO 51 01 19, 01314 Dresden, Germany
A. Schamlott
Affiliation:
Research Centre Rossendorf, Central Department Radiation Source ELBE, PO 51 01 19, 01314 Dresden, Germany
J. M. Ortega
Affiliation:
LURE, Bât. 209d, Université de Paris-Sud, BP 34, 91898 Orsay Cedex, France
F. Glotin
Affiliation:
LURE, Bât. 209d, Université de Paris-Sud, BP 34, 91898 Orsay Cedex, France
R. Prazeres
Affiliation:
LURE, Bât. 209d, Université de Paris-Sud, BP 34, 91898 Orsay Cedex, France
*
W.Seidel@fz-rossendorf.de
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Abstract

Low concentration of toxic radioactive metals in environmental samples often limits the interpretation of results of infrared studies investigating the interaction processes between the metal ions and environmental compartments. For the first time, we could show that photothermal infrared spectroscopy performed with a pulsed free electron laser can provide reliable infrared spectra throughout a distinct spectral range of interest. In this model investigation, we provide vibrational absorption spectra of a rare earth metal salt dissolved in a KBr matrix and a natural calcite sample obtained by photothermal beam deflection (PTBD) technique and FT-IR spectroscopy, respectively. General agreement was found between all spectra of the different recording techniques. Spectral deviations were observed with samples containing low concentration of the rare earth metal salt indicating a lower detection limit of the photothermal method as compared to conventional FT-IR spectroscopy.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 25 , Issue 1 , January 2004 , pp. 39 - 43
Copyright
© EDP Sciences, 2004

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