Analytical applications of x-ray excited optical fluorescence spectra. Internal standard principle

1968 ◽  
Vol 40 (14) ◽  
pp. 2082-2084 ◽  
Author(s):  
Edward L. DeKalb ◽  
Velmer A. Fassel ◽  
Takeshi. Taniguchi ◽  
T. R. Saranathan
Keyword(s):  
Fluorescence Spectra ◽  
Internal Standard ◽  
X Ray ◽  
Analytical Applications ◽  
Optical Fluorescence

scholarly journals Analytical Applications of X-ray Excited Optical Fluorescence Spectra

1969 ◽  
Vol 18 (4) ◽  
pp. 210-217 ◽  
Author(s):  
Tokunosuke NAKAJIMA ◽  
Hiroshi KAWAGUCHI ◽  
Kyoichiro TAKASHIMA ◽  
Yoshihiko OUCHI
Keyword(s):  
Fluorescence Spectra ◽  
X Ray ◽  
Analytical Applications ◽  
Optical Fluorescence

Raman And Fluorescence Spectra Observed in Laser Microprobe Measurements of Several Compositions in the Ln-Ba-Cu-O System

1990 ◽  
Vol 48 (2) ◽  
pp. 278-279
Author(s):  
Edgar S. Etz ◽  
Thomas D. Schroeder ◽  
Winnie Wong-Ng
Keyword(s):  
Fluorescence Spectra ◽  
Single Phase ◽  
X Ray Diffraction ◽  
Ceramic Powders ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Raman Microprobe ◽  
Methods Of Synthesis ◽  
Compositional Homogeneity ◽  
Processing Techniques

We are investigating by Raman microprobe measurements the superconducting and related phases in the LnBa2Cu3O7-x (for x=0 to 1) system where yttrium has been replaced by several of the lanthanide (Ln = Nd,Sm,Eu,Ho,Er) elements. The aim is to relate the observed optical spectra (Raman and fluorescence) to the compositional and structural properties of these solids as part of comprehensive materials characterization. The results are correlated with the methods of synthesis, the processing techniques of these materials, and their superconducting properties. Of relevance is the substitutional chemistry of these isostructural systems, the differences in the spectra, and their microanalytical usefulness for the detection of impurity phases, and the assessment of compositional homogeneity. The Raman spectra of most of these compounds are well understood from accounts in the literature.The materials examined here are mostly ceramic powders prepared by conventional solid state reaction techniques. The bulk samples are of nominally single-phase composition as determined by x-ray diffraction.

Luminescent Properties of Gd2MoO6:Eu3+ Nanophosphor for WLEDs

2021 ◽  
Author(s):  
Yan Chen ◽  
Yuemei Lan ◽  
Dong Wang ◽  
Guoxing Zhang ◽  
Wenlong Peng ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Fluorescence Spectra ◽  
Solvothermal Method ◽  
Luminescent Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

A series of Gd2-xMoO6:xEu3+(x=0.18-0.38) nanophosphors were synthesized by the solvothermal method. The properties of this nanophosphor were characterized by x-ray diffraction (XRD), transmission electron microscope (TEM), fluorescence spectra and diffuse...

Combining in-cell NMR and X-ray fluorescence microscopy to reveal the intracellular maturation states of human superoxide dismutase 1

2015 ◽  
Vol 51 (3) ◽  
pp. 584-587 ◽  
Author(s):  
E. Luchinat ◽  
A. Gianoncelli ◽  
T. Mello ◽  
A. Galli ◽  
L. Banci
Keyword(s):  
Superoxide Dismutase ◽  
Nmr Spectroscopy ◽  
Fluorescence Microscopy ◽  
Superoxide Dismutase 1 ◽  
X Ray ◽  
Optical Fluorescence ◽  
Human Sod1

Combined in-cell NMR spectroscopy, X-ray fluorescence and optical fluorescence microscopies allow describing the intracellular maturation states of human SOD1.

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.%.

CHOOCH: a program for deriving anomalous-scattering factors from X-ray fluorescence spectra

2001 ◽  
Vol 34 (1) ◽  
pp. 82-86 ◽  
Author(s):  
Gwyndaf Evans ◽  
Robert F. Pettifer
Keyword(s):  
Absorption Edge ◽  
Fluorescence Spectra ◽  
Heavy Atom ◽  
Fortran Program ◽  
Anomalous Scattering ◽  
Tabular Data ◽  
X Ray ◽  
Scattering Factor ◽  
Experimental Values ◽  
Kronig Relation

A Fortran programCHOOCH, which derives experimental values of the anomalous-scattering factorsf′′ andf′ from X-ray fluorescence spectra, is described. The program assumes knowledge of theoretical values for the imaginary term,f′′, of the anomalous-scattering factor away from the absorption edge to scale the experimental fluorescence spectrum and thus derive values off′′ near the absorption edge, where tabular data are inappropriate. The Kramers–Kronig relation is used to calculate the real part,f′, of the anomalous-scattering factor. The program aids the decision-making process in macromolecular crystallographic experiments where optimal wavelength selection is required. Magnitudes off′ andf′′ at selected wavelengths can later be used as starting values for heavy-atom refinement with crystallographic phasing programs.

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