Micro X-ray fluorescence spectroscopy (µ-XRF)
The Orbis PC SDD is a micro EDXRF analyzer with a Rh tube as X-ray source. The instrument can be used to determine the elemental composition of solids with a spatial resolution of down to 30 μm. The instrument is particularly useful for mapping the spatial distribution of elements relative to each other. Determination of absolute quantities is very challenging. Only elements with atomic numbers above 10 (Na and higher) can be detected. The detection limit varies considerably between elements and ranges from a few to several hundreds of ppm. The instrument is equipped with a poly-capillary optic and two collimators, which can be used when lower spatial resolution is required. The micro-XRF technique is non-destructive and requires little sample preparation.