Quantitative Determination of Crystalline Phases in Nuclear Waste Glasses

1981 ◽  
Vol 11 ◽  
Author(s):  
R. H. Feld ◽  
M. Stammler
Keyword(s):  
Quantitative Determination ◽  
Nuclear Waste ◽  
Crystalline State ◽  
Physical Stability ◽  
Multicomponent System ◽  
High Level Waste ◽  
Crystalline Phases ◽  
X Ray ◽  
High Level

In order to assess the longterm chemical and physical stability of high level waste glasses it is important to know the amounts of crystalline phases present.In principal all information about the crystalline state can be derived from its X-ray powder diffraction pattern,provided the spectral resolution is sufficiently high. Powderdiffraction techniques are the only means available to determine the concentration of crystalline phases in the presence of equivalent amorphous components. In addition it permits the determination of specific crystalline phases in a multicomponent system.

Quantitative Determination of some Carbonate Minerals in Greenschist Facies Meta-volcanic Rocks

1972 ◽  
Vol 9 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Calvert C. Bristol
Keyword(s):  
Standard Deviation ◽  
Quantitative Determination ◽  
Volcanic Rocks ◽  
Internal Standard ◽  
Greenschist Facies ◽  
Carbonate Mineral ◽  
Mineral Contents ◽  
X Ray ◽  
Fine Grained

X-ray powder diffraction methods, successful in quantitative determination of silicate minerals in fine-grained rocks, have been applied to the determination of calcite, dolomite, and magnesite in greenschist facies meta-volcanic rocks. Internal standard graphs employing two standards (NaCl and Mo) have been determined.Carbonate mineral modes (calcite and dolomite) for 6 greenschist facies meta-volcanic rocks obtained by the X-ray powder method have been compared to normative carbonate mineral contents calculated for the same rocks. This comparison showed a maximum variation of 7.7 wt.% between the X-ray modes and the normative carbonate mineral contents of the rocks. Maximum standard deviation for the X-ray modes of these rocks was equivalent to 4.4 wt.%.

1-Methylphenanthro[3,4-b]thiophene: Determination of the tertiary structure in solution and in the crystalline state by NMR spectroscopy and X-ray diffraction

1985 ◽  
Vol 22 (2) ◽  
pp. 545-553 ◽  
Author(s):  
M. J. Musmar ◽  
Gary E. Martin ◽  
Robert T. Gampe ◽  
Vincent M. Lynch ◽  
Stanley H. Simonsen ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Crystalline State ◽  
Tertiary Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure In Solution

Quantitative Determination of Lateral Concentration and Depth Profile of Histidine-Tagged Recombinant Proteins Probed by Grazing Incidence X-ray Fluorescence

2013 ◽  
Vol 117 (17) ◽  
pp. 5002-5008 ◽  
Author(s):  
Alexander Körner ◽  
Wasim Abuillan ◽  
Christina Deichmann ◽  
Fernanda F. Rossetti ◽  
Almut Köhler ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Recombinant Proteins ◽  
Depth Profile ◽  
Grazing Incidence ◽  
X Ray

scholarly journals Accuracy improvement in XRF analysis for the quantification of elements ranging from tenths to thousands μg g−1 in human tissues using different matrix reference materials

2020 ◽  
Vol 35 (12) ◽  
pp. 2920-2927
Author(s):  
Jorge Machado ◽  
Patrícia Miguel Carvalho ◽  
Ana Félix ◽  
Delfin Doutel ◽  
José Paulo Santos ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Reference Materials ◽  
Fluorescence Spectrometry ◽  
Human Tissues ◽  
Accuracy Improvement ◽  
External Calibration ◽  
X Ray ◽  
Xrf Analysis ◽  
Calibration Approach

In this work, we aim at achieving the most accurate quantitative determination of elements in human tissues by means of X-ray fluorescence spectrometry using the external calibration approach.

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