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EDXRF Vs WDXRF

Product catalog summary

Introduction
Many companies consider using energy dispersive x-ray fluorescence (EDXRF) analyzers as a cost-effective alternative to wavelength dispersive x-ray fluorescence (WDXRF) analyzers. However, EDXRF is not a direct replacement and has distinct differences that must be evaluated.

WDXRF Overview
WDXRF uses an x-ray source to excite a sample, with emitted x-rays diffracted by a crystal. The detector measures specific wavelengths, allowing for sequential or simultaneous analysis of elements.

EDXRF Overview
EDXRF can use direct excitation or a secondary target to excite the sample. A detector measures the fluorescent and scattered x-rays, producing a spectrum through a multichannel analyzer.

Points of Comparison

Resolution: WDXRF offers higher resolution, reducing spectral overlaps and background intensities. EDXRF resolution depends on the detector, with varying effectiveness.
Spectral Overlaps: WDXRF's high resolution minimizes the need for spectral deconvolution, whereas EDXRF requires deconvolution, introducing potential errors.
Background: WDXRF benefits from resolution in reducing background radiation, while EDXRF uses filters and targets to achieve similar reductions.
Source Efficiency: EDXRF is more efficient, requiring less power due to shorter path lengths and direct excitation, whereas WDXRF loses intensity at the diffraction device.
Excitation Efficiency: EDXRF can optimize excitation efficiency using filters and secondary targets, whereas WDXRF uses a continuum of energies.

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