How Fluorescence Creates an XRF Measurement
In XRF analysis, the analyser directs X-rays at the sample. This energy can displace inner-shell electrons from atoms in the material. When electrons from higher energy levels move to fill those spaces, the atoms release energy as fluorescent X-rays.
Each element produces fluorescent X-rays at specific energies. The analyser detects these energies and uses them to identify which elements are present. It can also measure signal intensity to estimate concentration, provided the calibration and sample conditions are suitable.
This process is why XRF is useful for fast, non-destructive elemental analysis. The sample does not need to be dissolved or destroyed, and results can often be produced in seconds. Handheld XRF analysers apply the same principle in a portable format for field and on-site use.
Fluorescence is affected by the sample matrix, surface condition, element type and concentration. Coatings, contamination, particle size, moisture and uneven surfaces can influence how X-rays are generated, absorbed and detected. These factors should be considered when interpreting XRF results.
Understanding XRF for Practical Elemental Analysis
To explore the technique further, review PAS’s guide to X-Ray Fluorescence technology and the available handheld XRF analyser range. You can also visit Portable Analytical Solutions or get in touch to discuss XRF use for your materials or field application.