X-ray fluorescence spectrometry is an excellent technique for the analysis of
elements in solid and liquid samples. The analysis is performed directly on
the sample after short sample preparation. By irradiating the sample with
X-rays the atoms in the sample produce their specific X-ray radiation. All
elements from carbon to lead can be analysed this way, quantitative analysis
is possible for elements heavier than oxygen. After calibration for a specific
analysis XRF is fast, reproducible and accurate. For unknown matrixes a
fundamental parameter program is used for semi-quantitative element
concentration calculation.
For reasons of sensitivity and versatility, the combination of a high power
sealed X-ray tube and detection by wavelength dispersion is the most practical
and efficient technique. The element analysis group has two wavelength
dispersion spectrometers; one for light elements in solids and one for all
elements (>Na) in liquids and solids.
For micro and spatial resolved analysis (spot diameter is 0.1/0.3 mm) an Eagle
microprobe spectrometer is available.
Characteristics for X-ray fluorescence analyses
non-destructive
solid and liquid matrices
large linear dynamic
range
mg/g to m% range
standard less or by using matrix sample
specific calibrations
sample amount: mg to g
multi-element
(50-60 at once)
qualitative and quantitative
turn around time:
fast, if needed within an hour
