Journal
X-RAY SPECTROMETRY
Volume 46, Issue 2, Pages 102-106Publisher
WILEY
DOI: 10.1002/xrs.2737
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Funding
- Portuguese Fundacao para a Ciencia e Tecnologia (FCT) [UID/FIS/04559/2013]
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/94234/2013, SFRH/BPD/92329/2013]
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In this paper, we study the performance of a portable energy dispersive X-ray fluorescence spectrometer by making use of different filter configurations at the X-ray tube output. To fulfill this purpose, we systematically investigated how the detection limits (DL) can be improved by applying three different combinations of filters (Al, Cu and Al + Cu) between the X-ray tube and standard reference materials of different average-Z matrices. The obtained results were compared with the DL obtained with a benchtop system with triaxial geometry, considered the benchmark in detection of trace elements in a variety of sample matrices. The major differences occurred for the low-Z matrices, reflecting the increase of DL for elements with emission energies between 5 and 15 keV using filters. Regarding the high-Z matrices, the use of filters did not render an effective improvement in the DL but had a positive effect in diminishing sum peaks that could hinder the evaluation of some elements. Copyright (C) 2017 John Wiley & Sons, Ltd.
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