scholarly journals Determination of major and minor elements in fused coal ash samples with energy dispersive xray spectrometry using a fundamental parameter approach

1979 ◽  
Author(s):  
L Janke ◽  
W J Montgomery ◽  
G M Hickman ◽  
R Dureau
Keyword(s):  
Coal Ash ◽  
Energy Dispersive ◽  
Fundamental Parameter ◽  
Minor Elements ◽  
Parameter Approach

scholarly journals Phase Equilibria of the MnTe-Sb2Te3 System and Synthesis of Novel Ternary Layered Compound – MnSb4Te7

2021 ◽  
Vol 22 (1) ◽  
pp. 39-44
Author(s):  
E.N. Orujlu ◽  
Z.S. Aliev ◽  
I.R. Amiraslanov ◽  
M.B. Babanly
Keyword(s):  
Primary Crystallization ◽  
Layered Compound ◽  
Fundamental Parameter ◽  
Bulk Single Crystal ◽  
X Ray Diffraction ◽  
Solution Field ◽  
Title System ◽  
First Time ◽  
Parameter Approach

By using Differential Thermal Analysis (DTA) and Powder X-ray Diffraction (PXRD) techniques, the phase diagram of the MnTe-Sb2Te3 system has been constructed for the first time in the entire composition range. The system features two ternary layered van der Waals (vdW) compounds. Apart from known MnSb2Te4, novel MnSb4Te7 which a structural analogous of the known MnBi4Te7 was found in the system. Crystal structure parameters of both compounds were determined by Rietveld refinement using the fundamental parameter approach. Both compounds were found to decompose via peritectic reactions and possess significant homogeneity ranges. The title system is also characterized by the existence of the wide solid solution field based on the starting Sb2Te3. The present results would be useful for the bulk single crystal growth of both compounds from the liquid phase via the determination of primary crystallization areas.

EDXRF Determination of Major and Minor Elements in Compound Fertilizers

1984 ◽  
Vol 28 ◽  
pp. 215-220
Author(s):  
Leif Højslet Christensen ◽  
Leif Rasmussen
Keyword(s):  
Sample Preparation ◽  
Unique Solution ◽  
Fundamental Parameter ◽  
Fluorescence Technique ◽  
Matrix Correction ◽  
X Ray ◽  
Minor Elements ◽  
Elemental Analyses ◽  
Precision And Accuracy

AbstractThe combination of the energy-dispersive x-ray fluorescence technique and a backscatter/fundamental parameter-based matrix correction approach provides a new and unique solution to elemental analyses of fertilizers. This is demonstrated by means of results obtained for three reference materials and a range of in-house fertilizers. The results further demonstrate problems of sample preparation as well as the precision and accuracy of the method.

Quantitative Energy Dispersive X-Ray Flourescence Analysis of Low Alloy Steel by Regression and Modified Fundamental Parameter Techniques

2012 ◽  
Vol 620 ◽  
pp. 480-485
Author(s):  
Yusoff M.S. Meor ◽  
Muslimin Masliana ◽  
Paulus Wilfred
Keyword(s):  
Quantitative Analysis ◽  
Alloy Steel ◽  
Pure Metal ◽  
Fundamental Parameter ◽  
Low Alloy Steel ◽  
Fast Analysis ◽  
X Ray ◽  
Minor Elements ◽  
Edxrf Analysis

EDXRF analysis provides several important advantages such as simultaneous determination of the elements present, analyses of wide concentration ranges, and fast analysis with no sample preparation. The paper relates a comparative quantitative analysis using regression and modified Fundamental Parameter Technique FPT methods in the determination of minor elements present in low alloy steel. Regression was developed by plotting calibration graphs using low alloy reference standards while the modified FPT method involves incorporation of pure metal spectrum to the existing equation to improve on the accuracy of the analysis. Discrepancy tests carried out for the two methods showed that the error ranges were 0.3-6.5% and 1.2-7.9% for regression and modified FPT analyses, respectively. This makes the FPT method more acceptable for quantitative analysis of elements present in low alloy steel.

Preparation And elemental analysis of ancient fibers

1987 ◽  
Vol 45 ◽  
pp. 410-411
Author(s):  
Allen Angel ◽  
Kathryn A. Jakes
Keyword(s):  
Cross Sections ◽  
Physical Structure ◽  
Energy Dispersive ◽  
Archaeological Sites ◽  
X Ray ◽  
Long Term Storage ◽  
Backscattered Electron ◽  
Electron Imaging

Fabrics recovered from archaeological sites often are so badly degraded that fiber identification based on physical morphology is difficult. Although diagenetic changes may be viewed as destructive to factors necessary for the discernment of fiber information, changes occurring during any stage of a fiber's lifetime leave a record within the fiber's chemical and physical structure. These alterations may offer valuable clues to understanding the conditions of the fiber's growth, fiber preparation and fabric processing technology and conditions of burial or long term storage (1).Energy dispersive spectrometry has been reported to be suitable for determination of mordant treatment on historic fibers (2,3) and has been used to characterize metal wrapping of combination yarns (4,5). In this study, a technique is developed which provides fractured cross sections of fibers for x-ray analysis and elemental mapping. In addition, backscattered electron imaging (BSI) and energy dispersive x-ray microanalysis (EDS) are utilized to correlate elements to their distribution in fibers.

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