Results 291 to 300 of about 152,477 (353)

Dilution method in x-ray fluorescence spectrometry

Microchemical Journal, 1978
Abstract The Lachance-Traill method was modified to a dilution method that retains all the advantages of the original method plus it enables the determination of as many elements as one pleases and is far simpler mathematically. The method had been tested with determination of copper, molybdenum, zinc, and arsenic in copper intermediates.
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Analysis of waste water by x‐ray fluorescence spectrometry

X-Ray Spectrometry, 2002
AbstractMethods of specimen preparation for the x‐ray fluorescence analysis of water are described. For direct determination of impurities in waste water samples, quasi‐solid specimens based on gelatin (agar) are proposed. Such specimens may also be used after extractive enrichment of impurities and their re‐extraction into the aqueous phase.
L. P. Eksperiandova, A. B. Blank, Ya. N. Makarovskaya   +2 more
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Current Trends in X-Ray Fluorescence Spectrometry

Applied Spectroscopy, 1969
Calculation methods for quantitative analysis, energy dispersion, and inhomogeneous samples are current areas in x-ray analysis which offer hope of reducing analysis costs. Other areas which extend the capabilities of x-ray analysis include improved analyzer crystals, diffraction gratings, and effects of valence on spectral lines.
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Progress in laboratory grazing emission x-ray fluorescence spectrometry

X-Ray Spectrometry, 1999
Recently, grazing emission x-ray fluorescence (GEXRF) spectrometry, also referred to as grazing exit spectrometry, attained a special position in the field of XRF. The technique exploits the advantages of the total-reflection phenomenon as is done in the related total-reflection XRF technique.
Claes, Martine, de Bokx, Pieter, Van Grieken, René   +2 more
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X‐ray fluorescence spectrometry in Dar es Salaam

X-Ray Spectrometry, 2005
AbstractEnergy‐dispersive x‐ray fluorescence (EDXRF) analysis has been established at the University of Dar es Salaam, Faculty of Science, Department of Physics. Calibration was conducted using thin films from Micromatter (USA) for secondary target XRF.
John W. Kondoro, Yusuf I. A. Koleleni
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Recent Advances in Portable X‐Ray Fluorescence Spectrometry

Applied Spectroscopy Reviews, 2004
Abstract X‐ray fluorescence (XRF) spectrometry is a nondestructive, rapid, simultaneous multi‐element analytical methodology for solid or liquid samples. Its applications are broad and XRF spectra cover most elements, with a dynamic range from 100% down to the µg/g level.
Bradley T. Jones, Xiandeng Hou, Yihua He
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Multielement x‐ray fluorescence spectrometry of solutions

X-Ray Spectrometry, 1980
AbstractThe theoretical relationships between fluorescence intensity and concentration have been used for the calculation of correction constants of the Lachance‐‐Traill and Rasberry‐‐Heinrich equation for systems of solutions. The constants have also been calculated by means of the multivariate least‐‐squares method.
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Geometry considerations in radioisotope X-ray fluorescence spectrometry

Journal of Physics E: Scientific Instruments, 1985
A new approach to the evaluation of geometry constants using X-ray fluorescence and coherent scattering has been developed. The accuracy is greatly improved by ratio measurements where the dependence on the accuracy of the fundamental parameters is eliminated.
N. S. Saleh, A. B. Hallak
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Determination of Beryllium by Using X-ray Fluorescence Spectrometry

Analytical Chemistry, 2008
X-ray fluorescence spectrometry method is subject to certain difficulties and inconveniences for the elements having the atomic number 9 or less. These difficulties become progressively more severe as the atomic number decreases, and are quite serious for beryllium, which is practically indeterminable directly by XRF.
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Use of Carbon Materials of Different Nature in Determining Metal Concentrations in Carbon Nanotubes by X-Ray Fluorescence Spectrometry

Journal of Analytical Chemistry, 2020
A. A. Zhdanov, M. Kazakova
semanticscholar   +1 more source