2021-3-12 · Here we demonstrate the ability of a synchrotron-based X-ray fluorescence (SXRF) microprobe to quantify the elements Si, Mn, Fe, Ni, and Zn in individual aquatic protist cells. This technique distinguishes between different types of cells in an assemblage and between cells and other particulate matter.
2020-1-21 · An X-ray fluorescence (XRF) spectrometer is an x-ray instrument used for routine, relatively non-destructive chemical analyses of rocks, minerals, sediments and fluids. It works on wavelength-dispersive spectroscopic principles that are similar to an …
2015-9-25 · Fluorescence microscope images of bacterial cells for (a) control sample and samples exposed to (b) polyhedral, (c) flower-like and (d) thumbtack-like Cu/Cu x O NPs (total cells stained with DAPI, dead cells stained with PI).(e) Fluorescence-based assay showing the antimicrobial activity of copper NPs.Data are expressed as mean ± SD, n = 3. The test confirms decreased viable cells with …
2014-11-8 · X-ray fluorescence (XRF) is a well known nondestructive technique. It is also applied to multilayer characterization, due to its possibility of estimating both composition and thickness of the layers. Several kinds of cultural heritage samples can be considered as a complex multilayer, such as paintings or decorated objects or some types of metallic samples. Furthermore, they often have rough ...
X-ray fluorescence (XRF) is a non-destructive analytical method that allows the identification and quantification of the chemical elements present in the surface of a wide variety of objects. It is currently widely applied in the investigation and characterisation …
X-ray fluorescence microscopy indicated that the calcium concentration in pituitary tissue was about 2.5 mM, 10-times more than zinc and 50-times more than copper. Although no higher than cytosolic levels, secretory granule levels of copper exceeded PAM levels by a factor of 10.
Quantification of modifiers in advanced materials based on zinc oxide by total reflection X-ray fluorescence and inductively coupled plasma mass spectrometry Article Feb 2016
6 Copper oxide Cu 06 60.76 60.23 99.12 7 Copper oxide Cu 07 41.81 41.17 98.47 8 Copper oxide Cu 08 21.49 21.09 98.15 Average（X） 99.09 standard deviation (S) 0.60 Conclusions . Energy dispersive X-ray fluorescence spectrometry EDXRF) is used to determine the ( copper content in copper oxide used for fireworks and firecrackers, this method is ...
2016-2-16 · full quantification • Ideal for materials engineering applications in various industries Small spot analysis • Narrow spot analysis of specimens selectable with on-board camera • Pinpoint focus with X-ray beam diameters of 1.5 mm or 0.5 mm • Allows full quantification when combined with UniQuant standard-less analysis software
2006-11-15 · The method is applied to characterize the copper(II) oxide (CuO) surface layer on copper(I) oxide (Cu2O) nanoparticles as well as the reduction kinetics of Cu2+ when held under X-ray irradiation ...
2019-2-28 · X-ray Fluorescence Phenomenon The X-ray and radiation physics behind XRF spectrometry is described in detail elsewhere (e.g. Shackley 2011; Pollardet al. 2007; Moens, et al. 2000). Presented here is a brief overview of the basic principles. When atoms in a material are externally excited by high-energy, short-wavelength radiation of sufficient ...
2011-4-30 · X-ray fluorescence microscopy (XFM) facilitates high-sensitivity quantitative imaging of trace metals at high spatial resolution over large sample areas and can be applied to a diverse range of biological samples. Accurate determination of elemental content from recorded spectra requires proper calibration of the XFM instrument under the relevant operating conditions. Here, we describe the ...
Conference proceedings of EXSA2021 virtual conference on X-ray spectrometry. EXSA established in 2017 a series of biennial workshops, first focused on quantitative aspects in X-Ray Spectrometry. These events support EXSA''s primary objective to foster the innovation and cooperation between X-ray spectroscopists and analysts and to have a ...
2013-11-1 · XRF quantification is very accurate for bronze corrosion layers of up to ca. 25 ... treatments prior to measurement (especially for techniques such as Proton-Induced X-ray Emission Spectroscopy (PIXE) or X-ray fluorescence Spectrometry, ... such forms are a mixture of copper oxide compounds. SEM results clearly indicate the formation of the two ...
Quantification of elements in copper–zinc ores at micro- and macro-levels by total reflection X-ray fluorescence and inductively coupled plasma atomic emission spectrometry† Pavel Yu. Sharanov, * a Dmitry S. Volkov a and Nikolai V. Alov a
2018-8-1 · Portable X-ray fluorescence spectrometry for the analyses of cultural heritage, IOP Conf. series: materials science and engineering, vol. 37, International Conference on the Use of X-ray (and Related) Techniques in Arts and Cultural Heritage (XTACH 11) (2012), p. 012001
A synchrotron-based system was used for the detection of the x-ray fluorescence (XRF) emitted from iron, copper, zinc and potassium in breast tissue specimens, healthy and cancerous. Calibration models resulting from the irradiation of standard aqueous solutions were used for the quantification of …
2020-1-28 · XRF (X-ray fluorescence) is a non-destructive analytical technique used to determine the elemental composition of materials.XRF analyzers determine the chemistry of a sample by measuring the fluorescent (or secondary) X-ray emitted from a sample …
2005-10-5 · X ray fluorescence spectrometry is a well-established analytical technique widely used in industrial and research applications for elemental composition analysis. A relatively recent development has been the availability of portable instrumentation, which can be used for both
2011-12-2 · The X-ray fluorescence analysis records the following range of energy or wavelengths: E = 0.11 – 60 keV λ = 11.3 – 0.02 nm Apart from the wave properties, light also has the properties of particles. This is expressed by the term "photon".
The fluorescence emission of CuNPs increases with the increase of Cu 2+ concentration, which is directly proportional to the concentration of exosomes. Our method allows quantitative analysis of exosomes in the range of 7.5 × 10 4 to 1.5 × 10 7 particles/μL with a detection of limit of 4.8 × 10 4 particles/μL in biological sample.
2020-6-21 · X-ray fluorescence (XRF) analysis can be used for the determination of elemental composition and thickness analysis of thin films as well. Here, a Bruker XTrace micro-XRF (μ-XRF) with a Rhodium anode, operating at 50 kV and 600 μA, has been …
2021-6-25 · The X-ray fluorescence spectroscopy (XRF) has been widely applied on the analysis of elements. The traditional sample preparation needs a large sample weight and high temperature/pressure. To overcome these drawbacks, we used graphene oxide (GO) as a matrix for the carry of trace metal (copper was used as a model) and constructed a sandwich ...
2019-7-2 · A new approach for the direct determination of the elemental composition of sulfide and oxide copper–zinc ores in the solid state by total reflection X-ray fluorescence spectrometry (TXRF) is proposed. This approach based on the preparation of suspensions in high viscosity liquids without a sample digestion
1976-3-1 · X-Ray spectrometry is a most convenient routine method for the analysis of copper intermediates (con- centrates, slags, mattes, calcines, and fluxes) because of its speed. Fusion of samples with sodium and lith- ium tetraborate is a favourite technique used in X …
2020-5-11 · Texture Analysis and Quantification. All of the texture analysis algorithms were developed in MATLAB ®.The processor used in this study to perform the computational tasks was Intel ® Xeon ® CPU E5-2650 v3 @2.3 GHz (40 CPUs) with 262 GB of Random Access Memory (RAM). Table 3 gives some information about the acquired 3D image. It is also worth noting that the drill core only makes some …
2006-9-27 · Characteristic X-ray fluorescence is a technique that can be used to establish elemental concentrations for a large number of different chemical elements simultaneously in different locations in cell and tissue samples. Exposing the samples to an X-ray beam is the basis of X-ray fluorescence microscopy (XFM).
Abstract. This work presents a technique for a rapid and accuracy measurement of copper content using X-ray fluorescence spectroscopy (XRF). This approach improves the accuracy and shortens the ...
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