Working Principle

Working Principle of an ED-XRF Spectrometer

SPECTRO`s stationary X-Ray spectrometers are based on the method of the Energy-Dispersive-X-Ray-Fluorescence analysis (ED-XRF). The atoms in the sample material, which could be any solid, powder or liquid, are excited by X-Rays emitted from a X-Ray tube or radioisotope. For increasing sensitivity the primary excitation radiation can be polarised by using specific targets between the X-Ray tube and
the sample (ED-P(olarisation)-XRF). All element specific X-Ray
fluorescence signals emitted by the atoms after the photoelectric
ionisation are measured simultaneously in a fixed mounted semi-
conductor detector or sealed gas-proportional counter.

The radiation intensity of each element signal, which is proportional to
the concentration of the element in the sample, is recalculated internally
from a stored set of calibration curves and can be shown directly in
concentration units.

Download Schematics of the working principle (pdf file)

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