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Methoden und Instrumentierung Poster: Mi., 14:00–16:30 M-P27
Analytical applications of X-ray micro fluorescence
Roland Hergenröder 1 , Markus Krämer 1 , Alex von Bohlen 1
1 ISAS-Institute for Analytcal Sciences, Bunsen-Kirchhoff Str.11, 44139 Dortmund
The increased interest in spatial resolved X-ray fluorescence chemical analysis in medicine,
biology, and material sciences demands, special, new instrumental solutions. Submicrometer
resolution combined with high sensitivity and monochromatic excitation
over a wide range of energies can only be realized in a reasonable measuring time when
applying synchrotron radiation as an exciatation source. A typical application field is
the analysis of objects of cultural heritage. The material composition of outstanding
archaeological finds from the city area of Dortmund was characterized by using SR-
EDXRF. As an example object, a decoration plate of a buckler used by the Germans
living in the 4th century AC in this area which is made of a silver plate decorated
with silver pearls and gold foils, is presented. The pearls and foils were fixed with a
tin solder onto the silver base. The provenance of the materials was deduced to be
Scandinavia by regarding the historical background. Other applications fields that will
be demonstarted and discussed are from material science and biology. Here, X-ray
fluorescence spectroscopy with high spectral resolution due to a wavelength dispersice
spectrometer [1]in the low energy regime (< 2 keV) is used to deduce chemical binding
states from chemical shift measurements.
[1] A. von Bohlen, R. Hergenröder, C. Sternemann, M. Paulus, M. Radtke and H.
Riesemeier, Instrumentation Science & Technology, 2005, 33, 137-150