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Energy-Dispersive X-Ray Fluorescence Analysis in Geochemical Mapping

✍ Scribed by Nikolla Civici; René Van Grieken

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
180 KB
Volume
26
Category
Article
ISSN
0049-8246

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✦ Synopsis

The beneÐts of using energy-dispersive X-ray Ñuorescence analysis (EDXRF) for geochemical mapping projects are described. Thick pellets of geochemical samples, soil and sediment were measured in a secondary target excitation EDXRF system, using Mn and Mo secondary targets for excitation of low-and medium-Z elements, respectively. Ba and some rare earth elements were determined using an Am-241 source. A fundamental parameter approach and the program COREX were used for calculating the concentrations. Depending on the composition of the sample, 20-30 elements could be determined. The precision and accuracy of the method were evaluated by repeated analyses of a series of standard reference materials recommended for use as primary standards in geochemical mapping. In most cases, the results showed good agreement with the certiÐed values, i.e. the data were within recommended limits.

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