X-ray fluorescence spectroscopy
The use of wavelength-dispersive x-ray fluorescence (WDXRF) spectroscopy and multivariate techniques for the assessment of illegal dyes in spices
... Visible spectroscopy requires extraction of the dyes from the matrices using appropriate solvents and then filtration for sample clean-ups (Di Anibal et ...as X-ray fluorescence ...
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Assembly of a portable X-ray fluorescence spectrometer with tri-axial geometry
... of X-ray spectrometry ...on X-ray emission and production phenomena, as well as in other interaction ...The X-ray is an electromagnetic radiation that can suffer refraction, ...
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Determination of nickel and manganese contaminants in pharmaceutical iron supplements using energy dispersive X-ray fluorescence
... Raman spectroscopy, we would be able to analyze the molecular forms of the inorganic compounds with nickel and manganese and further access its potential toxicities to ...
8
Laser-induced breakdown spectroscopy (LIBS), wavelength dispersive x-ray fluorescence (WDXRF) and chemometrics: possibilities for analytical applications in food analysis
... The present study aims to develop a fast and simple method for the determination of potassium (K), magnesium (Mg) and phosphor (P) in bean seed samples employing a data fusion strategy in the low-level with laser-induced ...
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Avaliação do uso de laser-induced breakdown spectroscopy (LIBS) e wavelength dispersive x- ray fluorescence (WDXRF) na análise direta de couros naturais e sintéticos
... dispersive X-ray fluorescence instru- ment (Thermo Fischer, Madison, WI, ...with X-ray emission provided by a Rh tube with a maximum of 4200 ...the X- rays emitted from the ...
212
DISSERTAÇÃO_Quantification of soil oxides via handheld X-ray fluorescence spectrometry
... Nowadays, spectroscopy-based methods have been successfully used worldwide for the determination of soil elemental composition (Weindorf et ...the X-ray fluorescence analysis of soils was ...
43
Energy-dispersive X-ray absorption spectroscopy at LNLS: investigation on strongly correlated metal oxides
... An overview of the EDXAS beamline implemented at the Brazilian Synchrotron Light Laboratory has been given. The choice of the optics and detection scheme has been deter- mined by the bending-magnet source ...
10
REVIEW Portable X-ray fluorescence (pXRF) applications in tropical Soil Science
... emission spectroscopy (ICP-AES) with certified reference materials, found that pXRF provided adequate results for Ti, Fe, Cu, Zn, Mn, Cr, Sr, Cd, and Pb after careful sample preparation and pXRF ...
10
Energy-dispersive x-ray fluorescence analysis of modern coloured glasses from Marinha Grande (Portugal)
... The majority of the blue glasses analysed in this study are characterized by the presence of Co (low factor 4 scores) and/or high Cu content (high factor 5 scores). These samples constitute the copper blues (samples I, V ...
6
Quantitative measurement of PM<sub>10</sub> by means of X-ray fluorescence spectra
... emission spectroscopy that uses the inductively coupled plasma to produce excited atoms and ions that emit electromagnetic radiation at wavelengths character- istic of a particular element (Stefansson et ...
20
Application of scanning electron microscopy–energy dispersive X-Ray spectroscopy (SEM-EDS)
... friendly and make things easier for peak assignment. As previously pointed out, quantitative SEM-EDS should only be carried out in flat polished samples or very thin films with irrelevant topography. Prior to spectra ...
17
Detection of genetically altered copper levels in Drosophila tissues by synchrotron x-ray fluorescence microscopy.
... mass spectroscopy are not sensitive enough for use with the small tissue amounts available in Drosophila ...synchrotron x-ray fluorescence microscopy analysis of two different Drosophila ...
8
STUDY ON VINASSE DYNAMICS IN SOIL USING ENERGY DISPERSIVE X-RAY FLUORESCENCE WITH RADIOISOTOPIC EXCITATION1
... In relation to the concentration of this element in the clayey soil it can be observed that in the control samples its value was 184 ppm, while the first layer soil treated with vinasse,[r] ...
9
X-ray photoelectron spectroscopy study of interaction of Np5+ with goethite α-FeOOH
... disposal. X-ray photoelectron spectroscopy has proved to be the most adequate method for determination of radionuclide physical and chemical states ...the X-ray photoelectron ...
7
Near-edge X-ray absorption spectroscopy signature of image potential states in multilayer epitaxial graphene
... Raman spectroscopy analysis of the 2D band of all samples. X-ray grazing-incidence scattering was used to observe the orientational order of neighboring graphene layers, which is deter- mined by the ...
6
Infrared and x-ray photoelectron spectroscopy study of chloride effect in palladium catalysts.
... disperso com o oxigênio do suporte alumina pode também resultar em um efeito semelhante ao do cloreto. Uma redução parcial do efeito do envenenamento por cloreto pode ser obtida quando usa-se molibdênio/alumina como ...
4
Calibration strategies for elemental determination using direct solid analysis by x-ray spectroscopy and laser-induced breakdown spectroscopy
... of X-ray absorption spectra in speciation of Cu during the reduction of Cu-based catalyst supported in alumina (reduction of Cu +II to Cu 0 involving a Cu +I species at 250 °C) with hierarchical ...
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DISSERTAÇÃO_Prediction of soil properties via portable x-ray fluorescence (pXRF) spectrometry in Brazil
... To assess the nutrient content in soil, samples have traditionally been submitted to a laboratory for analysis. Conventional laboratory analyses are costly, time-consuming, and generate chemical residues. To overcome ...
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Screening investigation of toxic chemical elements in school supplies by x-ray fluorescence.
... que o Cu é responsável por essa distinção (8,04 keV). Analisando-se as PC3 e PC4 (Figura 6), com 7,91 e 6,52% de informação, respec- tivamente, há uma orientação das amostras azuis da marca A e das roxas da marca B para ...
9
Elementary Chemical Analysis in Leaves Infected by Fumagina by X-Ray Fluorescence Technique
... Dispersion X-Ray Fluorescence Technique (EDXRF) was employed to study the effects of the fumagina disease on the elementary chemical composition of the ...Mo X-ray tube (K ∝ = ...
10