The GoldXpert for gold testing with XRF analyzers provides a fast, highly accurate way to determine karatage (gold content) for quality control, pricing, and usage purposes. It allows the user to perform an on-the-spot, cost-effective, and completely non-destructive test to check for gold content and verify alloy chemistry.
In addition to gold, the GoldXpert provides a high level of performance for other precious metals of interest. The analyzers com standard with a precious metals suite that includes Ag, Au, Pt, Pd, Ir, Rh, i, Pb, Cu, Zn, Fe, Co, and other elements.
The GoldXpert is easy to use. Place large objects directly on the analysis window.
Secure small objects in the sample-holder to orient on the analysis window.
Use small spot collimation for very small objects or for small areas on an object.
Close the chamber door and press Start to get results you can count on.
In the XRF Spectrometry technique, concentration of elements in a sample can be identified. XRF (X-ray Fluorescence) is a consequence of electron shell transitions that take place within an atom. This occurs when photons (incident X-rays: see diagram) are emitted from a source and have enough energy to knock electrons out of the innermost orbital of atoms in the sample. When a high energy photon hits an atom, it may knock electrons out of inner orbitals (eg K shell: see diagram). When this occurs, the atoms become ions, which are unstable. Electrons seek stability and the lowest possible energy state. Therefore, a more energetic electron from an outer orbital (eg L shell: see diagram) will move into the newly vacant space in the inner orbital. Electrons in outer shells have more energy then electrons in more inner orbitals. They need to release this excess energy as they drop down to fill the vacancy in the inner shell.
This released energy is given off as a photon (secondary X-ray) which are characteristic of that element and can be detected by an x-ray detector.
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