Substitution–dilution method to correct the matrix effect in multi-element quantitative analysis by X-ray fluorescence

2001 ◽  
Vol 56 (2) ◽  
pp. 187-201 ◽  
Author(s):  
F Bosch-Reig ◽  
J.V Gimeno-Adelantado ◽  
S Sánchez-Ramos ◽  
D.J Yusá-Marco ◽  
F Bosch-Mossi
Keyword(s):  
Quantitative Analysis ◽  
Matrix Effect ◽  
Dilution Method ◽  
X Ray ◽  
The Matrix

Correction of Matrix Effect in Multielemental Quantitative Analysis by X-Ray Fluorescence Spectroscopy Using the Linear Behavior in the Analytical Range of the Substitution-Dilution Method

2002 ◽  
Vol 56 (1) ◽  
pp. 58-61
Author(s):  
F. Bosch-Reig ◽  
J. V. Gimeno-Adelantado ◽  
S. Sánchez-Ramos ◽  
D. J. Yusá-Marco ◽  
F. Bosch-Mossi ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Matrix Effect ◽  
Linear Range ◽  
Factor H ◽  
Dilution Method ◽  
X Ray ◽  
Linear Behavior ◽  
Relative Standard ◽  
The Matrix ◽  
Analytical Range

This paper is an analytical study of the possibility of applying the linear range of the substitution-dilution method to correct the matrix effect in quantitative analysis by X-ray fluorescence (XRF) spectroscopy. The analytical range is obtained from a series of samples prepared in the form of glass discs by substituting the unknown sample with a standard sample (substitution factor, h) including a diluent-melt. In general, the substitution-dilution method is hyperbolic in character and therefore the diluent is required to ensure linear behavior between If vs. h in the experimental range. The linear range is located between the concentrations of standard and unknown for each element analyzed. This linear model makes it possible to correct the matrix effect in quantitative analysis by XRF using a single multi-elemental standard for different types of samples with a complex matrix, such as geologicals and cements. The results found for Si, Ti, Al, Fe, Mn, Ca, K, and P in soil and sediment samples and Si, Fe, Al, Ca, and K in cements (white and gray) are statistically satisfactory. Thus, the mean relative standard deviation calculated for all analytes in each sample was: ±4.0% and ±5.0% in soils; ±5.0% in sediments; and ±6.0% or ±3.0% in cements, white and gray, respectively.

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

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.

Particle Size Effects in Geological Analyses by X-Ray Fluorescence

1985 ◽  
Vol 29 ◽  
pp. 587-592
Author(s):  
K.K. Nielson ◽  
V.C. Rogers
Keyword(s):  
Particle Size ◽  
Quantitative Analysis ◽  
Size Effects ◽  
Light Element ◽  
New Method ◽  
X Ray ◽  
Particle Size Effects ◽  
Sample Matrix ◽  
Xrf Analysis ◽  
The Matrix

Particle-size effects can cause significant errors in x-ray fluorescence (XRF) analysis of particulate materials. The effects are usually removed when samples are fused or dissolved to standardize the matrix for quantitative analysis. Recent improvements in numerical matrix corrections reduce the need to standardize the sample matrix via fusion or dissolution, particularly when the CEMAS method is used to estimate unmeasured light-element components of undefined materials for matrix calculations. A new method to correct for particle-size effects has therefore been examined to potentially avoid the need for destructive preparation of homogeneous samples.

The Matrix Effect and Application of the Multi-Parameter Optimization Method for X-Ray Spectrometric Determination of the Quantitative Composition of Clays

2018 ◽  
Vol 788 ◽  
pp. 108-113
Author(s):  
Anna Trubaca-Boginska ◽  
Andris Actins ◽  
Ruta Švinka ◽  
Visvaldis Švinka
Keyword(s):  
Chemical Composition ◽  
Parameter Optimization ◽  
Matrix Effect ◽  
Standard Addition ◽  
Optimization Method ◽  
Quantitative Composition ◽  
Parameter Method ◽  
X Ray ◽  
Influence Coefficients ◽  
The Matrix

Determining the quantitative composition of clay samples with X-ray fluorescent spectrometry is complicated because of the matrix effect, in which any element can increase or decrease the analytical signals of other elements. In order to predict the properties of clays, it is essential to know their precise chemical composition. Therefore, using the standard addition method was determined calibration and empirical influence coefficients, as well as the true composition of the elements. Farther, these coefficients were used to correct the matrix effect and develop a multi-parameter optimization method. It was determined that in clay samples, consisting of Si, Al, Fe, K, Mg, Ca, Na and Ti oxide formula units, the most significant contribution for matrix effect correction calculations was from the calibration coefficients. Moreover, the largest deviation from the X-ray fluorescent data and true values was determined in the MgO and Na2O cases. In this study was established, that the developed multi-parameter method can be successfully applied to determine the quantitative chemical composition of clay samples of similar compositions.

Study of porous cellulose beads as a dye-ligand matrix. Effect of protein admixtures and concentration of immobilized dye in the quantitative analysis of lactate dehydrogenase: Cibacron blue interaction

1990 ◽  
Vol 55 (2) ◽  
pp. 581-586 ◽  
Author(s):  
Danica Mislovičová ◽  
Peter Gemeiner ◽  
Viera Ďurišová
Keyword(s):  
Quantitative Analysis ◽  
Lactate Dehydrogenase ◽  
Matrix Effect ◽  
Dissociation Constants ◽  
Cibacron Blue ◽  
Blue Dextran ◽  
Nonspecific Interaction ◽  
The Matrix ◽  
Bead Cellulose ◽  
Total Interaction

The effect of protein admixtures and concentration of immobilized dye on the interaction of lactate dehydrogenase (LDH) with Cibacron Blue-bead cellulose has been studied by means of zonal chromatography with Cibacron Blue-dextran T 10 as the mobile ligand. The influence of both variables on the values of dissociation constants of complexes immobilized dye-LDH (KI-L) and mobile dye-LDH (KM-L) can be summarized as follows: The values of KI-L remained practically constant and were found to be lower than those of KM-L. The differences found in KI-L and KM-L values should help to estimate the contribution of nonspecific interaction of the matrix to the total interaction between dye-ligand and the enzyme.

Quantitative Analysis of LIBS Reduces the Matrix Effect Methods

2013 ◽  
Vol 313-314 ◽  
pp. 579-582
Author(s):  
You Liang Yang ◽  
Jun Xiang Li ◽  
Fan Wei Meng ◽  
Cui Hong Ma
Keyword(s):  
Quantitative Analysis ◽  
Matrix Effect ◽  
Correction Method ◽  
Analysis Method ◽  
Network Reduction ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
The Matrix ◽  
Quantitative Analysis Method ◽  
The Impact

This paper introduced the principle about the technology of Laser-induced Breakdown Spectroscopy (LIBS) of quantitative analysis. It was reviewed about the quantitative analysis of LIBS reduced method of matrix. The reason of cause matrix effect was not clear, but the matrix effect on the LIBS quantitative analysis of the impact can not be ignored. The LIBS quantitative analysis method was divided into two categories: one was based on the calibration curve with the mathematical matrix correction method; the other was combined with neural network reduction method of matrix. This paper was introduced for the two categories of methods, and gives an example to explain.

Investigation of the Matrix Effect on the Accuracy of Quantitative Analysis of Trace Metals in Liquids Using Laser-Induced Breakdown Spectroscopy with Solid Substrates

2016 ◽  
Vol 70 (12) ◽  
pp. 2016-2024 ◽  
Author(s):  
Junshan Xiu ◽  
Lili Dong ◽  
Hua Qin ◽  
Yunyan Liu ◽  
Jin Yu
Keyword(s):  
Quantitative Analysis ◽  
Trace Metals ◽  
Matrix Effect ◽  
Solid Substrate ◽  
Laser Induced Breakdown Spectroscopy ◽  
Paper Substrate ◽  
Viscous Liquids ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
The Matrix

The detection limit of trace metals in liquids has been improved greatly by laser-induced breakdown spectroscopy (LIBS) using solid substrate. A paper substrate and a metallic substrate were used as a solid substrate for the detection of trace metals in aqueous solutions and viscous liquids (lubricating oils) respectively. The matrix effect on quantitative analysis of trace metals in two types of liquids was investigated. For trace metals in aqueous solutions using paper substrate, the calibration curves established for pure solutions and mixed solutions samples presented large variation on both the slope and the intercept for the Cu, Cd, and Cr. The matrix effects among the different elements in mixed solutions were observed. However, good agreement was obtained between the measured and known values in real wastewater. For trace metals in lubricating oils, the matrix effect between the different oils is relatively small and reasonably negligible under the conditions of our experiment. A universal calibration curve can be established for trace metals in different types of oils. The two approaches are verified that it is possible to develop a feasible and sensitive method with accuracy results for rapid detection of trace metals in industrial wastewater and viscous liquids by laser-induced breakdown spectroscopy.

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