Metals laboratories offer interesting analytical challenges in the sense that their materials and products can be very varied: wide elemental coverage, wide concentration ranges and varied samples matrices, varied sizes, coatings and layers, heterogeneities and inclusions.
Wavelength dispersive XRF has always been put to the test in these areas alongside other trace analysis techniques. Analytical performance of XRF instruments is being constantly advanced in order to cope with such challenges. In this technical poster, several applications are presented in which the power and flexibility of latest WDXRF spectrometers are fully exploited.
In order to assess the performance that can be reached when analyzing a spot of only 0.5 mm, a calibration has been performed using ferrous base standard samples. The standards used in
this small spot calibration can have diameters ranging from 11 mm to 30 mm; however they must be homogeneous in composition. Typical
examples of these calibration curves are shown in figure 3 on the poaster. Table 1 on the poster gives a summary of limits of detection
obtained using a set of international steel standards with the 0.5 mm spot. Results were obtained by using 100 seconds per element
counting times and the best conditions and parameters in regards to crystal, detector,
collimator and power.
Click here to view the Technical Poster: Applications of High Performance XRF in Metals Laboratories.