Advances in energy-dispersive X-ray fluorescence (original) (raw)
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Scientia Agricola, 1994
Three certified samples of different matrices (Soil-5, SL-1/IAEA and SARM-4/SABS) were quantitatively analysed by energy dispersive X-ray fluorescence with radioisotopic excitation. The observed errors were about 10-20% for the majority of the elements and less than 10% for Fe and Zn in the Soil-5, Mn in SL-1, and Ti, Fe and Zn in SARM-4 samples. Annular radioactive sources of Fe-55 and Cd-109 were utilized for the excitation of elements while a Si(Li) semiconductor detector coupled to a multichannel emulation card inserted in a microcomputer was used for the detection of the characteristic X-rays. The fundamental parameters method was used for the determination of elemental sensitivities and the irradiator or transmission method for the correction of the absorption effect of characteristic X-rays of elements on the range of atomic number 22 to 42 (Ti to Mo) and excitation with Cd-109. For elements in the range of atomic number 13 to 23 (Al to V) the irradiator method cannot be appl...
Crimson Publishers, LLC, 2018
Portable X-ray Fluorescence (pXRF) is a non-destructive compositional analysis technique, which allows the measurement in field, requiring minimum to no sample preparation. This mini-review presents the physical principles and examples of applications of pXRF for the analysis of mineralogical and environmental samples, such as rocks, soils and sediments. All examples described are from the present decade, in order to show some interesting aspect regarding elemental determination capability, result analysis, or sample preparation. Comparison between the results obtained from pXRF and other compositional analysis techniques are frequently present in order to show the positive and negative aspects of the pXRF for each type of sample.
THE CNESTEN EDXRF SPECTROMETERS - SENSITIVITY, CALIBRATION AND APPLICATION TO GEOCHEMISTRY
2000
The Laboratories of the National Center of Energy, Sciences and Nuclear Techniques (CNESTEN) in Morocco, has put at the disposal of the Moroccan scientific community very efficient energy dispersive X-ray fluorescence (ED-XRF) spectrometers. In this work, we present results on the calibration of two ED-XRF spectrometers, using different excition systems: 1) Fe- 55, Cd-109 and Am-241 radioactive sources, and 2)