X-Ray determination of the effective charges on sulfur and phosphorus atoms in chemical compounds

1992 ◽  
Vol 3 (4) ◽  
pp. 311-319 ◽  
Author(s):  
G. N. Dolenko ◽  
A. L. Litvin ◽  
V. P. Elin
Keyword(s):  
Chemical Compounds ◽  
X Ray ◽  
Effective Charges

scholarly journals Researches about the Assessment of Wastes Recycling Potential from

2012 ◽  
Vol 69 (2) ◽  
Author(s):  
Dana – Adriana ILUŢIU – VARVARA
Keyword(s):  
Chemical Characterization ◽  
Chemical Compounds ◽  
Metallurgical Industry ◽  
Pollution Potential ◽  
X Ray ◽  
Metallurgical Wastes ◽  
Recycling Potential ◽  
Feasible Solutions

The total quantity of wastes generated by metallurgical industry continues to grow. The storage of these wastes involves: occupying large areas of land; pollution potential of all environmental factors; expenses related to land storage etc. In order to eliminate the disadvantages entailed by the storage of metallurgical wastes one must find feasible solutions for their recycling or recovery. In this respect, a first step is their characterization. The paper presents an assessment of wastes recycling potential from metallurgical slag dumps. There were taken and chemically characterized the waste samples, in order to identify the compounds that have recycling potential. The determination of chemical composition of the waste samples was performed by spectrometric methods. The apparatus used was a spectrometer based on X-ray fluorescence. The chemical characterization is the most significant factor in determining the potential viability of recycling these wastes to recover metals. The results obtained from chemical characterization of these wastes, indicated the presence of the following compounds: magnesium oxide (MgO), calcium oxide (CaO), alumina (Al 2O3), total iron (Fe total), silicon dioxide (SiO2), manganese oxide (MnO), phosphorus pentoxide (P 2O5), vanadium pentoxide (V2O5), titanium dioxide (TiO2), chromium trioxide (Cr2O3), zinc oxide (ZnO) and lead oxide (PbO). Therefore, the identified chemical compounds have a major economic importance and through their recycling it is possible to save natural resources.

scholarly journals XRF ANALYSIS OF ARSENIC AND SELECTED METALS IN CONTAMINATED SAND FROM THE DISMANTLING OF INDUSTRIAL DISTILLATION PLANTS

2020 ◽  
Vol 20 (4) ◽  
pp. 1011-1018
Author(s):  
ANTOANETA ENE ◽  
FLORIN SLOATA
Keyword(s):  
Simultaneous Determination ◽  
Chemical Compounds ◽  
Energy Dispersive ◽  
Toxic Substances ◽  
Portable Xrf ◽  
X Ray ◽  
Spectrometric Technique ◽  
Accredited Laboratory ◽  
Very High

This paper refers to the application of XRF method for the simultaneous determination of arsenic and selected metals from waste samples resulted from the dismanlting of distilleries in the perimeter of Azomures S.A., Mures County, Romania. The dismantling operation was carried out by a specialized Romanian company, and from this operation resulted several refractory construction wastes, such as sands with a very high content of arsenic and its chemical compounds. In order to determine the arsenic and other metals concentration, the energy-dispersive X-ray fluorescence (ED-XRF) spectrometric technique was employed. Application of the ED-XRF method was performed in an accredited laboratory for the determination of toxic substances from various samples, using a Genius portable XRF (p-XRF) spectrometer manufactured by Skyray Instruments Inc.

Lateral resolution of the electron microbeam analysis

1978 ◽  
Vol 36 (1) ◽  
pp. 542-543
Author(s):  
H.J. Dudek
Keyword(s):  
Quantitative Analysis ◽  
Depth Resolution ◽  
Lateral Resolution ◽  
Cylindrical Particle ◽  
Correction Procedure ◽  
X Ray ◽  
Element Concentrations ◽  
Microbeam Analysis ◽  
The Matrix

The chemical inhomogenities in modern materials such as fibers, phases and inclusions, often have diameters in the region of one micrometer. Using electron microbeam analysis for the determination of the element concentrations one has to know the smallest possible diameter of such regions for a given accuracy of the quantitative analysis.In th is paper the correction procedure for the quantitative electron microbeam analysis is extended to a spacial problem to determine the smallest possible measurements of a cylindrical particle P of high D (depth resolution) and diameter L (lateral resolution) embeded in a matrix M and which has to be analysed quantitative with the accuracy q. The mathematical accounts lead to the following form of the characteristic x-ray intens ity of the element i of a particle P embeded in the matrix M in relation to the intensity of a standard S

Sem and X-Ray Analysis of Renal and Biliary Calculi

1976 ◽  
Vol 34 ◽  
pp. 306-307
Author(s):  
R. J. Narconis ◽  
G. L. Johnson
Keyword(s):  
Chemical Constituents ◽  
Natural State ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Additional Dimension ◽  
Biliary Calculi ◽  
Calculus Formation ◽  
Scanning Electron

Analysis of the constituents of renal and biliary calculi may be of help in the management of patients with calculous disease. Several methods of analysis are available for identifying these constituents. Most common are chemical methods, optical crystallography, x-ray diffraction, and infrared spectroscopy. The application of a SEM with x-ray analysis capabilities should be considered as an additional alternative.A scanning electron microscope equipped with an x-ray “mapping” attachment offers an additional dimension in its ability to locate elemental constituents geographically, and thus, provide a clue in determination of possible metabolic etiology in calculus formation. The ability of this method to give an undisturbed view of adjacent layers of elements in their natural state is of advantage in determining the sequence of formation of subsequent layers of chemical constituents.

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