Quantitative verification of 1 : 100 diluted fused glass beads for X-ray fluorescence analysis of geological specimens

2020 ◽  
Vol 35 (12) ◽  
pp. 2826-2833
Author(s):  
Ding-Shuai Xue ◽  
Ben-Xun Su ◽  
Dan-Ping Zhang ◽  
Yan-Hong Liu ◽  
Ju-Jie Guo ◽  
...  
Keyword(s):  
Preparation Method ◽  
Fluorescence Analysis ◽  
Small Sample ◽  
Glass Beads ◽  
New Method ◽  
Icp Oes ◽  
Acid Attack ◽  
X Ray ◽  
Accuracy And Precision ◽  
Quantitative Verification

This paper proposed a semi-automated small sample (30 mg) preparation method. The accuracy and precision of this new method were verified by measuring two CRMs among XRF, ICP-OES (fusion), and ICP-OES (acid attack) tools.

A method for determining the CEC and chemical composition of clays via XRF

Clay Minerals ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 717-725 ◽  
Author(s):  
S. Battaglia ◽  
L. Leoni ◽  
F. Sartori
Keyword(s):  
Matrix Effects ◽  
Fluorescence Analysis ◽  
Correction Method ◽  
Exchange Capacity ◽  
New Method ◽  
Chemical Compositions ◽  
Wet Chemistry ◽  
X Ray ◽  
Accuracy And Precision ◽  
Source Clays

AbstractA new method for determining the cation exchange capacity (CEC) of clays is proposed. The method is based on X-ray fluorescence analysis of natural and Ba-exchanged clays following the analytical procedure suggested by Franzini et al. (1975). This procedure, which utilizes powder pellets and is based on a full matrix correction method, is frequently applied in Earth Sciences laboratories for the routine analysis of minerals and rocks. For the analysis of Ba-exchanged clays, Franzini's procedure has been modified slightly to account for the contribution of Ba to matrix effects.The new method, which furnishes both the CEC and the chemical compositions of the whole natural clay samples, has been tested on the eight ‘Source Clays’ of The Clay Minerals Society. The results compare well with data reported in the literature and confirm the accuracy and precision of the method and make it a valid alternative to techniques based on wet chemistry, execution of which is usually more time-consuming and which often requires greater analytical skill.

A new method of depth sensitive micro-X-ray fluorescence analysis

2006 ◽  
Vol 248 (1) ◽  
pp. 142-149 ◽  
Author(s):  
A. Bjeoumikhov ◽  
S. Bjeoumikhova ◽  
R. Wedell ◽  
R. Gubzhokov ◽  
Z. Margushev
Keyword(s):  
Fluorescence Analysis ◽  
New Method ◽  
X Ray

A New Method for Quantitative X-Ray Fluorescence Analysis of Mixtures of Oxides or Other Compounds by Empirical Parameter Methods

1982 ◽  
Vol 26 ◽  
pp. 351-354 ◽  
Author(s):  
Michael Mantler
Keyword(s):  
Computer Program ◽  
Chemical Elements ◽  
Fluorescence Analysis ◽  
Theoretical Background ◽  
New Method ◽  
Fundamental Parameter ◽  
Mathematical Methods ◽  
Empirical Parameter ◽  
X Ray ◽  
New Type

Two principal mathematical methods are used for quantitative XRFA: fundamental parameter calculations and the evaluation of empirical parameter equations. A comprehensive computer program based upon fundamental parameter equations was introduced in 1976 by D. Laguitton and M. Mantler (LAMA-I) and improved by T. C. Huang in 1979 (LAMA-II). The present paper describes the features of the theoretical background of a computer program using a new type of empirical (alpha*-) parameter equations. It is essentially designed for convenient analysis of compounds including those containing chemical elements, that cannot be directly measured by conventional X-ray spectrometers, such as oxides, nitrides, and others. The program also communicates automatically with LAMA in order to establish theoretical tables of alpha*-coefficients as well as conventional alpha-coefficients.

JCPDS — International Centre for Diffraction Data Sample Preparation Methods in X-Ray Powder Diffraction

1986 ◽  
Vol 1 (2) ◽  
pp. 51-63 ◽  
Author(s):  
R. Jenkins ◽  
T. G. Fawcett ◽  
D. K. Smith ◽  
J. W. Visser ◽  
M. C. Morris ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Correct Choice ◽  
Stress And Strain ◽  
Diffraction Experiment ◽  
Preparation Methods ◽  
X Ray ◽  
Accuracy And Precision ◽  
Diffraction Angle ◽  
The Ideal

The aim of any diffraction experiment is to obtain reproducible data of high accuracy and precision so that the data can be correctly interpreted and analyzed. Various methods of sample preparation have been devised so that reproducibility, precision and accuracy can be obtained. The success of a diffraction experiment will often depend on the correct choice of preparation method for the sample being analyzed and for the instrument being used in the analysis.A diffraction pattern contains three types of useful information: the positions of the diffraction maxima, the peak intensities, and the intensity distribution as a function of diffraction angle. This information can be used to identify and quantify the contents of the sample, as well as to calculate the material's crystallite size and distribution, crystallinity, and stress and strain. The ideal preparation for a given experiment depends largely on information desired.

X-Ray Study of Pd40Cu30Ni10P20 Bulk Metallic Glass Brazing Filler for Ti-6Al-7Nb Alloy

2007 ◽  
Vol 539-543 ◽  
pp. 1983-1987 ◽  
Author(s):  
E. Miura ◽  
Gene E. Ice ◽  
E.D. Specht ◽  
J.W.L. Pang ◽  
Hidemi Kato ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Depth Profiling ◽  
Fluorescence Analysis ◽  
Small Sample ◽  
Second Phase ◽  
X Ray ◽  
Fluorescence Measurements ◽  
Mechanical Bond ◽  
Grain Distribution

Crystalline precipitates in a bulk-metallic-glass (BMG) braze were investigated with an intense x-ray microbeam. The precipitates were found in the Pd40Cu30P20Ni10 BMG braze matrix after joining crystalline Ti-6Al-7Nb. However, the role (if any) played by the precipitates in improving the mechanical bond of the BMG/crystalline joint is unknown. X-ray microdiffraction and microfluorescence measurements from small sample volumes were made with an ~ 0.5 x 0.5 μm2 beam. Spatially-resolved Laue diffraction and x-ray fluorescence measurements were made on several second-phase crystals within the BMG matrix. Although precipitate crystals with the observed compositions were anticipated to be predominantly hexagonal, one of the crystals was found to be cubic or tetragonal. The instrumentation includes capabilities for 3D depth-resolved measurements of crystal structure and for fluorescence analysis of elemental composition. Depth profiling gave information about the grain distribution and morphology in the BMG matrix.

scholarly journals X-Ray Fluorescence Analysis Applied to Small Samples

1977 ◽  
Vol 21 ◽  
pp. 171-185 ◽  
Author(s):  
J.M. Jaklevic ◽  
W.R. French ◽  
T.W. Clarkson ◽  
M.R. Greenwood
Keyword(s):  
Small Diameter ◽  
Fluorescence Analysis ◽  
High Sensitivity ◽  
Sample Volume ◽  
Small Sample ◽  
Small Samples ◽  
X Ray ◽  
Hair Samples ◽  
Fine Focus ◽  
Analysis System

We describe an adaptation of photon excited x-ray fluorescence analysis which is optimized for the analysis of small samples. A fine focus x-ray tube is used in conjunction with small diameter detector collimators in order to focus on a small sample volume with as high sensitivity as possible. Sample areas of less than 1 mm diameter can be analyzed with ppm detectability. In applications involving the analysis of human hair samples, a minimum detectable limit of 10 ppm Hg can be realized in a 1 mm long segment of a single hair in a counting time of 200 seconds. Simultaneous measurements of the sample mass can be obtained from the intensity of the incoherent scattering. An automated x-ray fluorescence analysis system using the technique for the scanning of elemental profiles in such hair samples will be described.

A new sample preparation method for WD-XRF analysis of sulfide ores by fusion techniques: a BN crucible for protection against contamination and quantitative retention of sulfur

2016 ◽  
Vol 8 (6) ◽  
pp. 1299-1306 ◽  
Author(s):  
Yanhong Liu ◽  
Dingshuai Xue ◽  
Hongyue Wang
Keyword(s):  
Sample Preparation ◽  
Preparation Method ◽  
Fluorescence Analysis ◽  
Sulfide Ores ◽  
Sample Preparation Method ◽  
X Ray ◽  
Xrf Analysis

In this article, a methodology is described for the wavelength-dispersive X-ray fluorescence analysis of sulfide ores by fusion techniques.

A fusion method for preparing glass samples of peridotitic and picritic rock compositions for bulk analysis

1995 ◽  
Vol 59 (395) ◽  
pp. 267-271 ◽  
Author(s):  
N. W. A. Odling
Keyword(s):  
Bulk Composition ◽  
Fluorescence Analysis ◽  
Significant Loss ◽  
Glass Beads ◽  
Crystalline Material ◽  
Time Analysis ◽  
Bulk Analysis ◽  
X Ray ◽  
Natural Rock ◽  
Microscope Stage

AbstractA design for a micro furnace and a fusion technique are described by which silicate materials (in particular picritic and peridotitic rock compositions) may be fused and quenched to a homogeneous glass without significant loss of components, for the purposes of bulk analysis. The furnace consists of a Pt wire electrical resistance heater mounted in a furnace assembly which is fitted to a microscope stage. Microscopic examination of the sample during the fusion process allows the sample to be quenched as soon as all crystalline material has been fused and thus minimizes the loss of iron and alkalis due either to over-heating or prolonged fusion time. Analysis of glass beads of a model peridotite composition (analysed independently by X-ray fluorescence analysis) shows that for typical fusion times (5–10 seconds) the bulk composition is preserved at distances of > 25 µm from the margins of the glass beads. Analysis of natural rock powders of known composition shows that the method can be used to analyse whole rock compositions. The furnace is simple to construct and cheap to run and provides a simple and rapid method of producing glass samples for bulk analysis.

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