Versatile XRF Spectrometer for Demanding Applications

The versatility and performance of the Spectro XEPOS Energy Dispersive X-ray spectrometer have made it the most powerful instrument in its class. This compact bench-top unit rapidly determines elements from Sodium to Uranium in samples as diverse as waste oils, minerals and contaminated land, yet with the lowest detection limits of any bench-top XRF. For many applications it easily competes with large high-power WDXRF instruments. To achieve this exceptional performance, the XEPOS combines a unique excitation system comprising of closely
coupled, Optimised Excitation by Target geometry, and a stateof- the-art Silicon Drift detector (SDD). A choice of up to eight polarising and secondary metal targets gives optimal excitation for the application. This results in high sensitivity together with low background signals, which therefore dramatically improves detection limits. A 50W X-ray tube allows the use of preferred spectral lines, even for heavy elements. The SDD, which does not require liquid nitrogen cooling, has good spectral resolution at high count rates for reduced measuring times and improved accuracy, coupled with excellent signal-to-noise characteristics, again contributing to improved detection limits.

The software and user interface have been developed to make this analytical power easily accessible to the user. Only three simple steps are needed to perform a routine analysis using a stored method, and only five to create a new one. For unknown samples, Spectro Analytical has developed TurboQuant, an expert system package that automatically calculates and corrects for matrix effects. The detection limits achievable with XEPOS have made it especially popular for environmental analyses where its speed and simplicity mean that these analyses can be done in real time.