A Glass Fusion Method for X-Ray Fluorescence Analysis

1966 ◽  
Vol 10 ◽  
pp. 489-493
Author(s):  
J. O. Larson ◽  
R. A. Winkler ◽  
J. C. Guffy
Keyword(s):  
Glass Composition ◽  
Internal Standard ◽  
Fluorescence Analysis ◽  
Disk Surface ◽  
Fusion Method ◽  
X Ray ◽  
The Past ◽  
Low Viscosity ◽  
Surface Imperfections ◽  
Instrumental Drift

AbstractA thermally tough, low-melting, low-viscosity glass composition is described that has been used as a fusion mixture in sample preparations for X-ray fluorescence analysis.The fusion mixture is cast into a glass disk which, after annealing, is used directly for the X-ray measurements. Problems arising from disk surface imperfections have, in the past, been minimized by either prolonged polishing of the glass surface, or grinding the disk and pressing the powder into a peltet. This practice has been eliminated through the incorporation of appropriate internal standard elements into the glass fusion mixture. This approach also minimizes interelement effects and errors due to instrumental drift.A variety of corrosion products have been successfully analyzed by this method. Results will be given.

Total reflection X-ray fluorescence analysis of fly ash from Bulgarian coal-fired power plants

2015 ◽  
Vol 69 (5) ◽  
Author(s):  
Albena K. Detcheva ◽  
Svilen E. Mitsiev ◽  
Paunka S. Vassileva ◽  
Juri H. Jordanov ◽  
Metody G. Karadjov ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Coal Fly Ash ◽  
Internal Standard ◽  
Fluorescence Analysis ◽  
Total Reflection ◽  
X Ray

AbstractThe contents of Cl, Ca, K, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Rb, Sr, Ba and Pb in raw coal fly ash from five Bulgarian power plants were determined by total reflection X-ray fluorescence (TXRF), using gallium as the internal standard. The samples were analysed as in slurry form in Triton

Determination of Actinide Elements in Nuclear Fuels by X-Ray Analysis

1974 ◽  
Vol 18 ◽  
pp. 62-75
Author(s):  
A.H.E. von Baeckmann ◽  
D. Ertel ◽  
J. Neuber
Keyword(s):  
Isotope Dilution ◽  
Active Material ◽  
Internal Standard ◽  
Fluorescence Analysis ◽  
Mass Spectrometric ◽  
Operating Conditions ◽  
Automated System ◽  
Isotope Dilution Analysis ◽  
Nuclear Fuels ◽  
X Ray

AbstractX-ray fluorescence analysis has been used for some years at two Institutes of the Karlsruhe Nuclear Research Center to determine routinely thorium, uranium, and plutonium in unirradiated and irradiated nuclear fuels. It has "been used in addition to assay neptunium, americium and curium contained in irradiated samples. The method excels because it is versatile, rapid, tamperproof, and efficient. As a rule, fission products, pollutions, and foreign activities do not interfere with the determination which can be made in a direct way without chemical separation. In practice, the nuclear fuels are dissolved prior to the analysis and a given amount of an appropriate element as an “internal standard” is added. The accuracies attainable (1 σ RSD better than 1 %) are comparable with the mass spectrometric isotope dilution analysis so that in the input analysis of reprocessing plants X-ray fluorescence analysis constitutes a true alternative to the mass spectrometric isotope dilution analysis.Within the efforts to automate the method the prototype of the fully automated system is presently tested with non-active material. A first, not yet fully automated, development stage is being installed in the Karlsruhe Reprocessing Plant. It is anticipated that it will be tested soon under operating conditions. Complete automation of the system is scheduled to be completed at a later date.

X-Ray Fluorescence Analysis of Tungsten-Molybdenum Metals and Electrolytes

1960 ◽  
Vol 4 ◽  
pp. 474-487
Author(s):  
K. R. Stever ◽  
J. L. Johnson ◽  
H. H. Heady
Keyword(s):  
Internal Standard ◽  
Fluorescence Analysis ◽  
Metal Powders ◽  
Soft Or ◽  
X Ray ◽  
Molybdenum Metal ◽  
Fused Salts ◽  
Hard Radiation ◽  
Impurity Elements

AbstractAn X-ray fluorescence method is presented for the analysis of tungsten-molybdenum solutions. Tungsten and molybdenum metal powders, produced by a fused-salt electrolysis procedure, are dissolved and analyzed for tungsten and molybdenum by using the W La1, Pt La1 intensity ratios. The platinum spectral line from the X-ray tube target serves as a self-internal standard. The sensitivity limit is about 0,05% and in the concentration range of 0.5 to 100%, the accuracy of analysis is within about 2% standard deviation. The technique is also applied to the analysis of tungsten and molybdenum in fused salts and to the determination of several other Impurity elements in these metals.A double detector modification for the General Electric X-ray unit is described. The detector consists of a double-window flow proportional counter tube backed up by a sealed krypton-filled counter tube. This allows counting of either soft or hard radiation at maximum efficiencies without the necessity of changing counter tubes. Advantages in specific applications are discussed.

A New Instrument for the Energy Dispersive X-Ray Fluorescence Analysis of Objects of Art and Archaeology

1991 ◽  
Vol 35 (B) ◽  
pp. 1157-1163 ◽  
Author(s):  
Manfred Schreiner ◽  
Michael Mantler ◽  
Franz Weber ◽  
Richard Ebner ◽  
Franz Mairinger
Keyword(s):  
Geographic Origin ◽  
Fluorescence Analysis ◽  
Energy Dispersive ◽  
X Ray ◽  
The Past ◽  
Material Analysis ◽  
New Instrument ◽  
Art Historians

Objects of art and archaeology are relicts of the past, and art historians, archaeologists and conservators are constantly concerned with the questions of where, when or by whom such artifacts were made. Usually stylistic considerations can provide answers to these questions, but as styles were sometimes copied at locations and times quite different from those for which they were most characteristic, material analysis is often essential when one is attempting to infer how and of what materials an object was made. The use of several compounds e.g. as pigments in paintings, or the deliberate alloying of Cu with Sn, As, Sb and Pb, has varied greatly from region to region and from time to time and can be used to infer the geographic origin of an object or at least the origin of the materials, out of which it was made.

A Glass Fusion Method for X-Ray Fluorescence Analysis

1967 ◽  
pp. 489-493
Author(s):  
J. O. Larson ◽  
R. A. Winkler ◽  
J. C. Guffy
Keyword(s):  
Fluorescence Analysis ◽  
Fusion Method ◽  
X Ray

The X-ray fluorescence analysis of ferronibium by a fusion method

1978 ◽  
Vol 7 (1) ◽  
pp. 2-4 ◽  
Author(s):  
H. L. Giles ◽  
G. M. Holmes
Keyword(s):  
Fluorescence Analysis ◽  
Fusion Method ◽  
X Ray

Application of Computers in Electron Probe and X-Ray Fluorescence Analysis

1971 ◽  
Vol 15 ◽  
pp. 56-69
Author(s):  
Stanley D. Rasberry
Keyword(s):  
Data Storage ◽  
Great Increase ◽  
Measurement Data ◽  
Fluorescence Analysis ◽  
General Purpose ◽  
Specimen Preparation ◽  
List Type ◽  
X Ray ◽  
The Past ◽  
Routine Service

This paper is a review of automation of electron microprobe and x-ray fluorescence instrumentation. Such a review seems timely because of the great increase in the application of computer systems in this field over the past decade. Some of these applications have been conceived to meet true technological needs while in other cases they have “been undertaken to “keep up with the Joneses.” I would like to show not only what automated systems are now feasible but also when and how they should he employed. The “when” and “how” of automation are largely dependent upon the application being considered; in this study, x-ray applications have been divided into the following classes; (1)on-stream process-control,(2)off-line quality assurance,(3)routine service laboratory,(4)general purpose analytical laboratory. Several phases are present in these classes, including: specimen preparation and loading, measurement, data acquisition and transfer, data processing and display, and finally, archival data storage. Various workers have undertaken the automation of all these operations in one or the other of the classes of applications; from a review of their work and by examining details of each operation within the framework of a given application, we can now draw conclusions on the extent of desirable automation.

A Fusion Method for the X-Ray Fluorescence Analysis of Portland Cements, Clinker and Raw Materials Utilizing Cerium (IV) Oxide in Lithium Borate Fluxes

1985 ◽  
Vol 29 ◽  
pp. 581-585 ◽  
Author(s):  
Gregory S. Barger
Keyword(s):  
Lanthanum Oxide ◽  
Raw Materials ◽  
Fluorescence Analysis ◽  
Lithium Borate ◽  
Fusion Method ◽  
X Ray ◽  
Long Wavelength ◽  
Oxide Addition ◽  
Wavelength Absorption ◽  
Method Analysis

AbstractThis method describes the addition of cerium (IV) oxide to a lithium borate flux. CeO2 provides a non-analytic glass former to the melt production. CeO2 also acts as an interelemental buffer replacing the use of lanthanum oxide for long wavelength absorption. With cerium oxide addition, excellent results are produced, resulting in part from the elimination of recrystallization problems encountered with lanthanum oxide use. Analytical results easily meet the ASTM C-114 qualification requirements for rapid method analysis of hydraulic cements.

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