Determination of Aluminum in Iron-Aluminum Alloys by Vacuum X-Ray Fluorescence

1962 ◽  
Vol 6 ◽  
pp. 339-344 ◽  
Author(s):  
J. C. Wagner ◽  
F. R. Bryan
Keyword(s):  
Standard Deviation ◽  
Aluminum Alloys ◽  
Chemical Analysis ◽  
X Ray ◽  
Iron Aluminum ◽  
Straight Line ◽  
Time Required ◽  
Analytical Time ◽  
Iron Aluminum Alloys

AbstractAluminum, is determined within the range 2-16% in iron. Repeatability of X-ray determinations is within a standard deviation of 0.07 % aluminum for a sample containing 10.2% aluminum. The standard deviation of the chemical values from the straight line calibration curve is 0.3% aluminum. X-ray analytical time is approximately 5% of the time required for chemical analysis. Peak-to-background ratio is improved by using a chromium-target thin-window X-ray tube instead of a tungsten tube.

X-Ray Spectrographic Determination of Tantalum, Columbium, Iron, and Titanium Oxide Mixtures Using Simple Arithmetic Corrections for Inter element Effects

1957 ◽  
Vol 1 ◽  
pp. 253-270
Author(s):  
Betty J. Mitchell
Keyword(s):  
Titanium Oxide ◽  
Titanium Oxides ◽  
Simple Arithmetic ◽  
Spectrographic Determination ◽  
Fluorescent Intensity ◽  
X Ray ◽  
Sample Matrix ◽  
Time Required ◽  
Analytical Time

AbstractA method of specific arithmetic corrections for absorption and enhancement interelement effects has been developed, with particular reference to the quantitative determination of mixtures of tantalum, columbium, iron, and titanium oxides. The combined oxides of these elements are prepared chemically from liquid, powder, or metallic samples; weight percantages are determined by reference to calibration and intensity correction curves relating fluorescent intensity to concentration and sample matrix. Tantalum, columbium, iron, or titanium oxide from 0.01 to 100% concentration can be determined with a reproducibility of 1% of the amount present at the 50% concentration and 10% of the amount present at the 1 or 0, 1% level. X-ray analytical time required averages less than 10 minutes per determination. The corrections which have been established are universally applicable to combinations of these four oxides which may be obtained by chemical treatment from such materials as columbite or tantalite ores, tantalum or columbium metalSj and titanium alloys. The method of arithmetic corrections for interelement effects is general in nature and may be applied to the determination of other elements in complex matrices.

X-Ray K absorption spectra of iron-aluminum alloys

1967 ◽  
Vol 15 (10) ◽  
pp. 1655-1659 ◽  
Author(s):  
H.N Murty ◽  
L.V Azároff
Keyword(s):  
Aluminum Alloys ◽  
Absorption Spectra ◽  
X Ray ◽  
Iron Aluminum ◽  
Iron Aluminum Alloys

New Coordination Compounds of Fe(III) with Organic Ligands

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Mihaela Flondor ◽  
Ioan Rosca ◽  
Doina Sibiescu ◽  
Mihaela-Aurelia Vizitiu ◽  
Daniel-Mircea Sutiman ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Complex Compounds ◽  
Organic Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Elemental Chemical Analysis ◽  
Structural Formulae ◽  
Paramagnetic Properties

In this paper the synthesis and the study of some complex compounds of Fe(III) with ligands derived from: 2-(4-chloro-phenylsulfanyl)-1-(2-hydroxy-3,5-diiodo-phenyl)-ethanone (HL1), 1-(3,5-dibromo-2-hydroxy-phenyl)-2-phenylsulfanyl-ethanone(HL2), and 2-(4-chloro-phenylsulfanyl)-1-(3,5-dibromo-2-hydroxy-phenyl)-ethanone (HL3) is presented. The characterization of these complexes is based on method as: the elemental chemical analysis, IR and ESR spectroscopy, M�ssbauer, the thermogravimetric analysis and X-ray diffraction. Study of the IR and chemical analysis has evidenced that the precipitates form are a complexes and the combination ratio of M:L is 1:2. The central atoms of Fe(III) presented paramagnetic properties and a octaedric hybridization. Starting from this precipitation reactions, a method for the gravimetric determination of Fe(III) with this organic ligands has been possible. Based on the experimental data on literature indications, the structural formulae of the complex compounds are assigned.

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.%.

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