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Wavelength dispersive X-ray fluorescence (WDXRF) is one of the most powerful and well established techniques for elemental analysis. It has several advantages, including light element sensitivity, exceptional elemental resolving power, and low limits of detection. Historical drawbacks of the WDXRF technique have been that such instruments are typically large, expensive, and require special utilities. With a size that is 1/4 that of traditional WDXRF units and a price that is approximately 1/2 of floor standing units, the Supermini200 changes everything.
The X-ray fluorescence (XRF) experiment begins with exposing a sample to high-energy photons from an X-ray tube, which induces transitions of electrons between atomic orbitals and results in the emission of fluorescent photons. By measuring the energy and intensity (count rate) of these photons, qualitative and quantitative information about the elemental composition is obtained.
Measurement quality, usually judged as precision (repeatability),
is a function of many factors. Two of the primary metrics are elemental peak resolution and photon counting rate.