Standardized inert dilution method in x-ray fluorescence analysis

1969 ◽  
Vol 41 (1) ◽  
pp. 42-45 ◽  
Author(s):  
Rafael. Vera Mege
Keyword(s):  
Fluorescence Analysis ◽  
Dilution Method ◽  
X Ray

A Rapid and Accurate X-Ray Determination of the Rare Earths Elements in Solid or Liquid Materials using the Double Dilution Method

1968 ◽  
Vol 12 ◽  
pp. 546-562
Author(s):  
R. Tertian
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Accurate Determination ◽  
Fluorescence Analysis ◽  
Dilution Method ◽  
Practical Advantage ◽  
X Ray ◽  
The Matrix

AbstractThe double dilution method has many important advantages. For any element to be determined, let us say A, It enables us to control or calculate the matrix factor (sum of the absorption end enhancement effects) for the sample being Investigated towards A radiation, and it furnishes corrected Intensities which are strictly proportional to A concentration. Thus the results are exact, whatever the general composition of the sample, their accuracy depending only on the quality of measurement and preparation. Another major practical advantage is that the method does not require systematic calibration but only a few permanent standards consisting of a pure compound or of an accurately known sample.The procedure has been tested successfully for accurate determination of rare earth elements using, for solid materials such as ores and oxide mixtures, the borax fusion technique. It also can be readily applied to liquids. All the rare earth elements can be titrated by that method, as well as yttrium, thorium and, if necessary, all the elements relevant to X-ray fluorescence analysis. The concentration range considered for solids is of one comprised between 0.5 and 100 % and, with a lesser accuracy, between 0.1 and 0-5 % Examples are given relative to the analysis of various ores. Finally it rcust be pointed out that the method is universal and applies to the analysis of every solid, especially ores, provided that they can be converted to solid or liquid solutions. It appears that most industrial analyses can be worked on In this way.

Correction parameters in X-ray fluorescence analysis applying the limit dilution method (LDM)

1992 ◽  
Vol 344 (1-2) ◽  
pp. 16-21 ◽  
Author(s):  
F. Bosch Reig ◽  
V. Peris Martinez ◽  
F. Bosch Mossi ◽  
J. V. Gimeno Adelantado
Keyword(s):  
Fluorescence Analysis ◽  
Dilution Method ◽  
X Ray ◽  
Limit Dilution Method

Hyperbolic model of the addition-dilution method in quantitative X-ray fluorescence analysis

1996 ◽  
Vol 51 (6) ◽  
pp. 569-577 ◽  
Author(s):  
F. Bosch Reig ◽  
J.V. Gimeno Adelantado ◽  
V. Peris Martinez ◽  
D.J. YusáMarco ◽  
F. Bosch Mossi ◽  
...  
Keyword(s):  
Fluorescence Analysis ◽  
Hyperbolic Model ◽  
Dilution Method ◽  
X Ray

Correction parameters in X-ray fluorescence analysis applying the limit dilution method (LDM)

1992 ◽  
Vol 344 (1-2) ◽  
pp. 22-26 ◽  
Author(s):  
F. Bosch Reig ◽  
F. Bosch Mossi ◽  
V. Peris Martinez ◽  
J. V. Gimeno Adelantado
Keyword(s):  
Fluorescence Analysis ◽  
Dilution Method ◽  
X Ray ◽  
Limit Dilution Method

Rapid X-ray fluorescence analysis of intercalation compounds for molybdenum and cobalt content

2021 ◽  
Vol 87 (8) ◽  
pp. 12-18
Author(s):  
V. N. Talanova ◽  
O. L. Lependina ◽  
D. Kh. Kitaeva ◽  
N. M. Kabaeva ◽  
R. U. Takazova ◽  
...  
Keyword(s):  
Molybdenum Disulfide ◽  
Cobalt Content ◽  
Fluorescence Analysis ◽  
Dilution Method ◽  
Metal Compounds ◽  
X Ray ◽  
Determination Error ◽  
Coupling Equations ◽  
Comparison Of The Results

Synthesizing and studying the properties of nanomaterials based on layered molybdenum disulfide, often face a need for rapid elemental analysis and prompt return of the material to the customer. Sometimes, nanoparticles of molybdenum disulfide are to be modified with metal compounds to improve the catalytic or magnetic properties of the material. We propose a method for rapid X-ray fluorescence determination of molybdenum and cobalt in the range of 10 – 50% in such compounds using a bulk method without dilution. Analytical signals were measured at the wavelengths of MoKα and CoKα lines using a VRA-30 spectrometer (Carl Zeiss, Germany; X-ray tube with Rh anode). The metal content was calculated using the derived coupling equations. The determination error ranges within ±2.7% (abs.) and 1.4% (abs.) for Mo and Co, respectively. Correctness of the method was confirmed for a batch of synthesized compounds by comparison of the results obtained with the data of XRF analysis using the dilution method traditionally used in the laboratory. The proposed rapid method provides simplification of the procedure and more than 4-fold shortening of analysis in time, the sample being preserved and can be used for further research.

Cardiac Output Determination during Intravenous Cardioangiography Using X-ray Fluorescence Analysis

1988 ◽  
Vol 29 (4) ◽  
pp. 419-422 ◽  
Author(s):  
M. Boijsen ◽  
F. Goss ◽  
L. Jacobsson ◽  
C. Lamm ◽  
D. Schlossman ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Contrast Medium ◽  
Reference Method ◽  
Fluorescence Analysis ◽  
Iodine Content ◽  
Indicator Dilution ◽  
Dilution Method ◽  
Flow Measurements ◽  
X Ray ◽  
Blood Flow Measurements

Cardiac output was determined with an indicator dilution technique during digital venous angiography of the left ventricle in 11 patients. The contrast medium injected into the right atrium was used as indicator. During and after the injection of contrast medium one blood sample per second was obtained through a catheter placed in the descending aorta. The samples were analyzed for iodine content with x-ray fluorescence analysis and cardiac output determined ad modum Stewart-Hamilton. Thermodilution was used as a reference method. The results indicate that the indicator dilution method with the use of contrast medium might be used for calibration of videodensitometric methods for blood flow measurements.

An x-ray microprobe based upon a close-coupled focal-spot / glass capillary arrangement

1992 ◽  
Vol 50 (2) ◽  
pp. 1758-1759
Author(s):  
D. A. Carpenter ◽  
M. A. Taylor
Keyword(s):  
Imaging Techniques ◽  
Fluorescence Analysis ◽  
High Sensitivity ◽  
Specimen Preparation ◽  
X Rays ◽  
Glass Capillary ◽  
Close Coupling ◽  
X Ray ◽  
Point To Point ◽  
Beam Damage

The development of intense sources of x rays has led to renewed interest in the use of microbeams of x rays in x-ray fluorescence analysis. Sparks pointed out that the use of x rays as a probe offered the advantages of high sensitivity, low detection limits, low beam damage, and large penetration depths with minimal specimen preparation or perturbation. In addition, the option of air operation provided special advantages for examination of hydrated systems or for nondestructive microanalysis of large specimens.The disadvantages of synchrotron sources prompted the development of laboratory-based instrumentation with various schemes to maximize the beam flux while maintaining small point-to-point resolution. Nichols and Ryon developed a microprobe using a rotating anode source and a modified microdiffractometer. Cross and Wherry showed that by close-coupling the x-ray source, specimen, and detector, good intensities could be obtained for beam sizes between 30 and 100μm. More importantly, both groups combined specimen scanning with modern imaging techniques for rapid element mapping.

Sign in / Sign up

Export Citation Format

Share Document