Results 271 to 280 of about 152,477 (353)

Elemental analysis with x-ray fluorescence spectrometry

SPIE Proceedings, 2012
Elemental analysis by means of X-ray fluorescence (XRF) spectrometry is based on the element-specific electromagnetic radiation induced as a consequence of inner-shell ionization. XRF spectrometry is ideal for the direct analysis of solid samples, but can also investigate fluid samples.
Davide Bleiner, Peter Lienemann
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Matrix Effect Corrections in X-ray Fluorescence Spectrometry

Journal of Chemical Education, 2019
X-ray fluorescence is subject to significant matrix effects, which must be corrected in order to obtain accurate quantitative results.
C. Bowers
semanticscholar   +1 more source

X-ray fluorescence spectrometry in art and archaeology

X-Ray Spectrometry, 2000
This paper presents examples of analyses by x-ray fluorescence (XRF) spectrometry in art and archaeology, including pigments in paint layers and illuminated manusripts, of iridescent glasses and of medieval coins. Theoretical aspects of information depths and shielding effects in layered materials are discussed.
Manfred Schreiner, Michael Mantler
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Atomic Spectrometry Update—Inorganic Mass Spectrometry and X-ray Fluorescence Spectrometry

J. Anal. At. Spectrom., 1988
This year's Update includes an extended mass spectrometry section based on full abstracts and covering fully this extensive area of analysis. The newly introduced instrumentation for Glow discharge MS and the combined MS techniques are particularly notable this year. The ICP-MS section continues to grow in line with the increasing number of instruments
John G. Williams, Jeffrey R. Bacon, Andrew T. Ellis   +2 more
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X-ray fluorescence spectrometry with synchrotron radiation

Analytica Chimica Acta, 1985
Abstract X-ray fluorescence spectrometry (x.r.f.) can be done through excitation with synchrotron radiation. This permits multi-element determinations in the trace region with improved detection limits compared to conventional x.r.f. Detection limits are evaluated and compared with theoretically calculated values.
W. Petersen, Arndt Knöchel, G. Tolkiehn
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Hand-held X-ray fluorescence spectrometry

Analytical Methods, 2019
This Technical Brief describes the evolution of hand-held X-ray fluorescence instrumentation designed for inorganic elemental analysis outside the confines of a laboratory, thereby offering the capability for in situ analysis. As well as providing an overview of the instrumentation, it aims to inform both analysts and less-technically aware users how ...
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The analysis of silver by x-ray fluorescence spectrometry

Analytica Chimica Acta, 1978
Abstract An x-ray fluorescence method is described for the analysis of silver alloys.The major element silver as well as the impurities are determined. Corrections are made for interelement and line overlap effects. The results obtained compare favourably with wet chemical and emission spectrometric values. The method is rapid and reliable.
F.T. Wybenga, L.R.P. Butler
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Semiquantitative Evaluation of Secondary Carbonates via Portable X‐ray Fluorescence Spectrometry

, 2017
Secondary CaCO₃ is commonly found in soils of arid and semiarid regions in variable states of development as Bk, Bkk, Bkkm, Ck, or, more rarely, Ak horizons.
S. Chakraborty, D. Weindorf, Camille A. Weindorf, B. Das, Bin Li, B. Duda, Sarah Pennington, Rebekah Ortiz   +7 more
semanticscholar   +1 more source

Analysis of tungsten carbides by X-ray fluorescence spectrometry

Talanta, 1976
Five sample presentation techniques were examined for the X-ray fluorescence spectrometric analysis of tungsten carbide alloys in powder and cemented forms. Powder samples may be oxidized by air at 600 degrees before fusion (I), or preferably by lithium nitrate during fusion (II); the fusion is effected with lithium-lanthanum tetraborate followed by ...
C.B. Belcher, A.C. Knott, K. Kinson
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X-Ray Fluorescence Spectrometry

2010
The article contains sections titled: 1. Introduction 2. Properties of X Rays 3. Interaction of X Rays with Matter 3.1. Photoelectric Effect 3.2. Scattered Radiation 4. Attenuation of X Rays in Matter 5. Penetration of X Rays 6. Instrumentation 6.1. X-Ray Sources 6.2. X-Ray Detectors 6.3. Geometrical Considerations 6.4.
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