Labeling elemental detection sensitivities in part per billion range using conventional geometry synchrotron assisted EDXRF measurements

Abstract

Energy dispersive X-ray fluorescence (EDXRF) is a widely used non-destructive technique for micro and trace multi-element analysis of materials. Conventional trials show that using laboratory assisted EDXRF measurements, one can obtain elemental detection limits in the range of {\mu}g/g to sub-{\mu}g/g level. In the present work a quantitative approach has been followed in attempting to explore how is it possible to obtain elemental detection limit in the range of ng/g by using simple EDXRF excitation (45{\deg}- 45{\deg} geometry) instead of using total reflection X-ray fluorescence (TXRF) technique, which renders relatively superior detection limits for different elements. In order to accomplish this, we recorded fluorescence spectrum from a standard reference sample (ICP-IV) in similar experimental conditions. The results show that using a very small quantity of sample on top of a thin kapton foil with a thickness ranging between 25-50 {\mu}m, as a sample carrier, the EDXRF technique may offer comparable elemental detection limits in contrast to TXRF technique.