165 results match your criteria analysis txrf

Circulating Concentration of Chemical Elements During Exercise-Induced Muscle Damage and the Repeated Bout Effect.

Biol Trace Elem Res 2021 Apr 27. Epub 2021 Apr 27.

Study Groups on Tissue Regeneration, Adaptation, and Repair, State University of Londrina, Londrina, Brazil.

The objective of the study was to evaluate the circulating levels of chemical elements after exercise-induced muscle damage (EIMD) followed by the repeated bout effect (RBE). Seven physically active subjects (26.5 ± 4. Read More

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Studies of Element Concentration in the Lymphocytes, Erythrocytes, and Plasma of Healthy Human Donors Using Total Reflection X-ray Fluorescence.

Appl Spectrosc 2021 Mar 4:3702821993496. Epub 2021 Mar 4.

Holy Cross Cancer Center, Kielce, Poland.

In this article, the total reflection X-ray fluorescence (TXRF) analysis was used for determination of element concentrations in three isolated peripheral blood components: lymphocytes, erythrocytes, and plasma, collected from 36 healthy donors (15 men and 21 women) from eastern Poland. The studied blood components were isolated from whole peripheral blood using Histopaque-1077 density gradient centrifugation. In the lymphocytes, the following elements were measured: P, S, Cl, K, Ca, Fe, Zn, Br, Sr, and Pb. Read More

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Study of chromium, selenium and bromine concentrations in blood serum of patients with parenteral nutrition treatment using total reflection X-ray fluorescence analysis.

PLoS One 2020 15;15(12):e0243492. Epub 2020 Dec 15.

Institute of Medical Sciences, Jan Kochanowski University, Kielce, Poland.

Total reflection X-ray fluorescence analysis (TXRF) was used to determine chromium, selenium and bromine concentrations in blood serum samples of 50 patients with parenteral nutrition treatment. The concentrations were measured two times, namely in the first day (I measurement) of the treatment and the seventh day (II measurement) after the chromium and selenium supplementation. For comparison purposes also serum samples of 50 patients without nutritional disorders, admitted to a planned surgical procedure to remove the gall bladder (cholecystectomy), were analyzed and treated as the control group. Read More

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January 2021

Lead (Pb) exposure assessment in dried blood spots using Total Reflection X-Ray Fluorescence (TXRF).

Environ Res 2021 07 10;198:110444. Epub 2020 Nov 10.

Faculty of Agricultural and Environmental Sciences, McGill University, Ste-Anne-de-Bellevue, Québec, Canada. Electronic address:

Lead (Pb) exposure is often determined through the analysis of whole blood though venipuncture poses ethical, economic, and logistical barriers. Dried Blood Spots (DBS) may help overcome such barriers though past studies measuring Pb in DBS have been challenged with quality control, small sample volumes, and other issues. Total Reflection X-Ray Fluorescence (TXRF) may help address some of these challenges but has yet to be used to measure Pb in DBS. Read More

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Features of sample preparation techniques in the total-reflection X-ray fluorescence analysis of tea leaves.

Food Chem 2021 May 31;343:128502. Epub 2020 Oct 31.

Institute of the Earth's Crust, SB RAS, 128 Lermontov st., Irkutsk, Russian Federation; Kazan National Research Technological University, 68 K.Marx st., Kazan, Russian Federation.

Tea is a popular drink around the world and contains essential minerals and trace elements for human health. In this study, the analytical capabilities of the total-reflection X-ray fluorescence method (TXRF) were considered for the analysis of tea. Different sample preparation techniques, e. Read More

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X-ray Fluorescence Techniques in Determining the Habitat Preferences of Species- (Ulvales, Chlorophyta) from Montenegro Case Study.

Molecules 2020 Oct 29;25(21). Epub 2020 Oct 29.

Department of Geobotany and Landscape Planning, Nicolaus Copernicus University, 87-100 Toruń, Poland.

The paper presents four new sites where bright green thalli were found inhabiting freshwater (a river, a ditch, the Milet Canal) and marine (on the rocky shore of the Adriatic Sea) habitats in Montenegro. The aims of this study were to determine, for the first time, whether specimens of collected in Montenegro are phylogenetically and morphologically the same species as the one occurring in Europe. Using total reflection X-ray fluorescence (TXRF) and wavelength dispersive X-ray fluorescence (WDXRF) techniques it assessed the elemental composition of their thalli and its influence to colonise new habitats. Read More

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October 2020

Simple and reliable determination of Zn and some additional elements in seminal plasma samples by using total reflection X-ray fluorescence spectroscopy.

Anal Methods 2020 10;12(40):4899-4905

University of Girona, Department of Chemistry, Girona, Spain.

Trace elements are essential for the normal spermatogenesis of mammals and play a critical role in sperm quality and pathological processes e.g. inflammation. Read More

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October 2020

Direct non-destructive total reflection X-ray fluorescence elemental determinations in zirconium alloy samples.

J Synchrotron Radiat 2020 Sep 19;27(Pt 5):1253-1261. Epub 2020 Aug 19.

Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.

The development of a direct non-destructive synchrotron-radiation-based total reflection X-ray fluorescence (TXRF) analytical methodology for elemental determinations in zirconium alloy samples is reported for the first time. Discs, of diameter 30 mm and about 1.6 mm thickness, of the zirconium alloys Zr-2. Read More

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September 2020

Multivariate probing of antitumor metal-based complexes damage on living cells through Raman imaging.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Jan 17;244:118838. Epub 2020 Aug 17.

Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil.

Intracellular modifications caused by two metal-based antitumor compounds were assessed by confocal Raman imaging assisted by multivariate curve resolution method, a very powerful deconvolution tool that can be used to extract the characteristic spectral profile of the individual or "purest" components from an image dataset. The use of this Raman methodology has the advantage of being non-invasive and totally label-free. Four main different intracellular processes were observed under the Raman imaging and multivariate approach combination, and even, significant differences could be identified between the treatments with both metallodrugs. Read More

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January 2021

Total Reflection X-ray Fluorescence spectrometry determination of titanium dioxide released from UV-protective textiles during wash.

Appl Radiat Isot 2020 Nov 24;165:109345. Epub 2020 Jul 24.

Applied Nuclear Physics Laboratory, Department of Physics, Londrina State University, Rodovia Celso Garcia Cid km-380, Londrina, Paraná, Brazil.

The aim of this study is to determine the release of TiO from six sport garments into the wash water after 1, 2 and 10 washes. For such, Total Reflection X-ray Fluorescence (TXRF) spectrometry was employed for the study of the wash water and Scanning Electron Microscopy - Energy Dispersive Spectrometry (SEM-EDS) was used for the analysis of the textiles. Results showed that the six sport garments released between 0. Read More

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November 2020

Hollow fiber liquid phase microextraction combined with total reflection X-ray fluorescence spectrometry for the determination of trace level inorganic arsenic species in waters.

Talanta 2020 Sep 13;217:121005. Epub 2020 Apr 13.

Department of Chemistry, University of Girona, Campus Montilivi, s/n. 17071, Girona, Spain. Electronic address:

In the present study, we investigated the possibilities and drawbacks of hollow fiber liquid phase microextraction (HF-LPME) combined with total reflection X-ray fluorescence (TXRF) spectrometry for the determination of low amounts of inorganic arsenic (As) species in water samples. The obtained results showed that a three-phase HF-LPME system was more suitable to be used in combination with TXRF than the two phase configuration, since lower detection limit and better precision for As determination can be attained. Relevant experimental parameters affecting As extraction (i. Read More

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September 2020

Zinc Concentration Dynamics Indicate Neurological Impairment Odds after Traumatic Spinal Cord Injury.

Antioxidants (Basel) 2020 May 13;9(5). Epub 2020 May 13.

BG Trauma Centre Ludwigshafen, Department of Paraplegiology, 67071 Ludwigshafen, Germany.

Traumatic Spinal Cord Injury (TSCI) is debilitating and often results in a loss of motor and sensory function caused by an interwoven set of pathological processes. Oxidative stress and inflammatory processes are amongst the critical factors in the secondary injury phase after TSCI. The essential trace element Zinc (Zn) plays a crucial role during this phase as part of the antioxidant defense system. Read More

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Structural Study of the Compounds Formed in the Reactions of FeCl·6HO with Ni(OH) in the Presence of Dithiolenes HSRSH (R = CHCl or CH).

Molecules 2020 May 10;25(9). Epub 2020 May 10.

Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain.

In our attempts to prepare coordination polymers by reaction of FeCl·6HO and Ni(OH) in the presence of dithiolenes HSCHXSH (X = Cl or H), several ion pairs of compounds containing the anionic entity [Ni(SCHXS)] were obtained instead. It was also found that other species without dithiolene ligands were formed in these reactions, giving rise to different ion pairs and a tetrametallic cluster. The careful isolation of the different types of crystalline solids allowed the characterization of all of the resulting compounds by single crystal X-ray diffraction (SCXRD). Read More

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Solid-state polymer membranes for simple, sensitive, and low-cost monitoring of mercury in water.

Sci Total Environ 2019 Dec 24;697:134099. Epub 2019 Aug 24.

School of Engineering, Institute for Infrastructure and Environment, University of Edinburgh, Edinburgh EH9 3JL, United Kingdom.

Solid-state Hg(II) selective membranes were produced and assessed by means of X-ray absorption near edge structure in the total reflection X-ray fluorescence (TXRF-XANES) setup and by the energy dispersive X-ray fluorescence (EDXRF) technique. Membranes were functionalized using four promising ligands for mercury complexation, i.e. Read More

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December 2019

Total reflection X-ray fluorescence analysis of elemental composition of herbal infusions and teas.

J Sci Food Agric 2020 Aug 26;100(11):4226-4236. Epub 2020 May 26.

Atominstitut, TU Wien, Vienna, Austria.

Background: The elemental composition of herbal infusions and teas has not been sufficiently investigated. It could potentially be used for defining fingerprints for individual herbal / tea infusions, differentiation of botanical families, detecting the influence of packaging, and other purposes. The objective of this study was to determine the elemental composition, including the trace element content, of various herbal infusions and teas by means of total reflection X-ray fluorescence analysis (TXRF), with a chemometrics approach using principal component analysis (PCA). Read More

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Total reflection X-ray fluorescence spectrometry for trace determination of iron and some additional elements in biological samples.

Anal Bioanal Chem 2020 Sep 26;412(24):6419-6429. Epub 2020 Apr 26.

Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081, Ulm, Germany.

Trace elements are essential for life and their concentration in cells and tissues must be tightly maintained and controlled to avoid pathological conditions. Established methods to measure the concentration of trace elements in biological matrices often provide only single element information, are time-consuming, and require special sample preparation. Therefore, the development of straightforward and rapid analytical methods for enhanced, multi-trace element determination in biological samples is an important and raising field of trace element analysis. Read More

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September 2020

Development and validation of a method for multielement analysis of apatite by total-reflection X-ray fluorescence spectrometry.

Talanta 2020 Jul 25;214:120870. Epub 2020 Feb 25.

Institute of the Earth's Crust, SB RAS, 128 Lermontov st., Irkutsk, Russian Federation.

Apatite group of minerals incorporates a large range of trace metals such as Sr, Y, U, Th, as well as the rare earth elements, that allows obtaining useful information on their genesis and could be used in several applications in geology and geochemistry. In this study, a new method for the multielement analysis of apatite using total-reflection X-ray fluorescence spectrometry (TXRF) was developed. The acid digestion procedure was chosen as an optimal sample preparation with the capability to analyze a low sample amount (~5-10 mg). Read More

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Analysis of elements secreted by CHO-K1 cells exposed to gamma radiation under different treatments.

Int J Radiat Biol 2020 04 4;96(4):469-481. Epub 2020 Feb 4.

Department of Molecular Bioscience, Centre for Radiation Protection Research, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden.

The aim of the study was to determine the concentration of elements using the two methods: total reflection X-ray fluorescence (TXRF) and wavelength dispersive X-ray fluorescence (WD-XRF) in two media, DMEM + and PBS+. Tests were carried out at 37 and 0 °C, irradiated by gamma radiation doses of 0, 0.25, 0. Read More

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Experimental evidence of matrix effects in total-reflection X-ray fluorescence analysis: Coke case.

Talanta 2020 Mar 15;209:120562. Epub 2019 Nov 15.

Servicio Interdepartamental de Investigación (SIdI), Laboratorio de TXRF, Universidad Autónoma de Madrid, 28049, Madrid, Spain. Electronic address:

Total-reflection X-ray Fluorescence (TXRF) analysis is an established method used in instrumental analytical chemistry. Benefits and drawbacks of the method are well known. They have been described in the past and presented in many papers in the last decades. Read More

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Dataset on the use of metal hydroxides, instead of flue gas desulfurization residues, to stabilize fly ash by using bottom ash.

Data Brief 2020 Feb 14;28:104970. Epub 2019 Dec 14.

INSTM and Chemistry for Technologies Laboratory, Department of Mechanical and Industrial, Engineering, University of Brescia, Via Branze, 38, 25123, Brescia, Italy.

Municipal solid waste incineration (MSWI) provides significant benefits on waste treatment technologies. Nevertheless some by-products such as fly ash (FA) and bottom ash (Ash) are produced in the incineration plant. Indeed, FA is considered a toxic waste due to the presence of leachable heavy metals (i. Read More

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February 2020

Proximal Composition of Undaria pinnatifida from San Jorge Gulf (Patagonia, Argentina).

Biol Trace Elem Res 2020 Jul 12;196(1):252-261. Epub 2019 Nov 12.

Instituto de Investigación e Ingeniería Ambiental (IIIA), CONICET-UNSAM, Av. 25 de Mayo y Francia 1650, San Martín, Buenos Aires, Argentina.

Undaria pinnatifida is a brown macroalga considered a high quality natural food because of its numerous health benefits. The aim of this paper is to provide seasonal information on the chemical content of blades and sporophylls of U. pinnatifida from San Jorge Gulf (SJG, Chubut, Argentina) in order to evaluate their different uses. Read More

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Application of total X-Ray fluorescence to gunshot residue determination.

Appl Radiat Isot 2019 Nov 7;153:108841. Epub 2019 Aug 7.

Comisión Nacional de Energía Atómica, Avda. Gral. Paz 1499. Villa Maipú, Pcia. de Buenos Aires, Argentina. Electronic address:

Currently the great majority of the criminal acts have involved the use of firearms, for these reasons the evidences generate from these are one of the fundamental pillars of a forensic investigation. The firearm leaves evidence known as gunshot residue (GSR), which is principally composed of burnt and unburnt particles from the detonation, as well as fragments of the bullet, cartridge case, and the firearm. Gunshot residue (GSR) is produced when a firearm is discharged and large quantities of it can be transferred to an individual who has fired. Read More

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November 2019

Chromium and Lead adsorption by avocado seed biomass study through the use of Total Reflection X-Ray Fluorescence analysis.

Appl Radiat Isot 2019 Nov 13;153:108809. Epub 2019 Jul 13.

Universidad de Buenos Aires, Facultad de Ingeniería, Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Paseo Colón 850, 5to piso, 1063, Buenos Aires, Argentina; Comisión Nacional de Energía Atómica, Gerencia Química. Av. Gral Paz 1499, 1650, San Martín, Argentina. Electronic address:

Adsorption is an effective method for the treatment of wastewater containing low concentrations of heavy metals. This kind of metals such as Chromium and Lead could affect health and the ecosystem. In this work, biomass of avocado seed was used as adsorbent. Read More

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November 2019

Characterization of the latex clearing protein of the poly(cis-1,4-isoprene) and poly(trans-1,4-isoprene) degrading bacterium Nocardia nova SH22a.

J Gen Appl Microbiol 2020 Jan 16;65(6):293-300. Epub 2019 Jul 16.

Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität.

Nocardia nova SH22a is an actinobacterium capable of degrading the polyisoprenes poly(cis-1,4-isoprene) and poly(trans-1,4-isoprene). Sequencing and annotating the genome of this strain led to the identification of a single gene coding for the key enzyme for the degradation of rubber: the latex clearing protein (Lcp). In this study, we showed that Lcp-contrary to other already characterized rubber cleaving enzymes-is responsible for the initial cleavage of both polyisoprene isomers. Read More

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January 2020

Multielemental composition and consumption risk characterization of three commercial marine fish species.

Environ Pollut 2019 Sep 12;252(Pt B):1026-1034. Epub 2019 Jun 12.

São Carlos School of Engineering, São Paulo University (USP), São Carlos, SP, Brazil; Department of Marine Science, Federal University of São Paulo (UNIFESP), 11030-400, Santos, SP, Brazil. Electronic address:

Marine fish are considered a source of high quality proteins and fatty acids. However, the consumption of fish may pose a health risk as it may have potentially toxic elements in high concentrations. In this study we quantify the multielemental composition of muscle and fins for three species of commercial marine fish from Brazil: Sphyraena guachancho (Barracuda), Priacantus arenatus (Common bigeye) and Genidens genidens (Guri sea catfish). Read More

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September 2019

Rapid multi-element characterization of microgreens via total-reflection X-ray fluorescence (TXRF) spectrometry.

Food Chem 2019 Oct 29;296:86-93. Epub 2019 May 29.

Department of Soil, Plant and Food Sciences, University of Bari "Aldo Moro", Via G. Amendola 165/A, 70126 Bari, Italy.

Microgreens are an emerging class of vegetables, which have become increasingly important in the agri-food market in recent years, and contain a number of macro- and micro-nutrients. This paper presents a rapid method for the elemental analysis of microgreens based on total reflection X-ray fluorescence (TXRF) spectroscopy, without preliminary sample digestion. The following elements were detected and quantified simultaneously for six microgreen genotypes, belonging to Asteraceae and Brassicaceae: P, S, K, Ca, Cl, Mn, Fe, Ni, Cu, Zn, Br, Rb, Sr. Read More

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October 2019

Possibilities and drawbacks of total reflection X-ray fluorescence spectrometry as a fast, simple and cost-effective technique for multielement analyses of cosmetics.

Anal Chim Acta 2019 Oct 7;1075:27-37. Epub 2019 May 7.

Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain.

This paper shows a simple, rapid and cost-effective method for multielement analyses of cosmetics. Total reflection X-ray fluorescence spectrometry (TXRF) is used to determine the composition, particularly the presence of potentially toxic elements, of cosmetics. Three sample preparation methods based on suspension preparation were developed for different types of cosmetic samples, e. Read More

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October 2019

Multianalytical characterization of biochar and hydrochar produced from waste biomasses for environmental and agricultural applications.

Chemosphere 2019 Oct 26;233:422-430. Epub 2019 May 26.

Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, Via G. Amendola 165/a, 70126, Bari, Italy. Electronic address:

Biochar (BC) and hydrochar (HC) are solid by-products obtained from various types of biomasses through the processes of pyrolysis and hydrothermal carbonization, respectively. Both BC and HC represent a sustainable solution for carbon sequestration and can be used as soil amendments or sorbents for organic and inorganic pollutants. However, the properties of BC and HC largely depend on feedstock and production parameters, which significantly affect their proper use. Read More

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October 2019

Topsoil pollution in highway medians in the State of São Paulo (Brazil): determination of potentially toxic elements using synchrotron radiation total reflection X-ray fluorescence.

Environ Sci Pollut Res Int 2019 Jul 20;26(20):20839-20852. Epub 2019 May 20.

Civil Engineering College, University of Campinas, 6143, Campinas, São Paulo State, 13083-889, Brazil.

The presence of metals in vehicle emissions is due to several factors, such as the composition of fuels and lubricating oils, the wear of engine components, and their use in catalytic converters. It is known that the soil near highways is greatly affected by heavy vehicle traffic, since the use of highways is of fundamental importance for the flow of goods and public transport, especially in Brazil, street transport being the main form of transport in the country. Considering the scenario described, the main objective of this study was to monitor the concentration of potentially toxic elements in surface soils located on the medians of the main access highways in the city of Campinas (SP-Brazil) and classify the soils through geoaccumulation index. Read More

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Development of Methods to Evaluate Several Levels of Uranium Concentrations in Drainage Water Using Total Reflection X-Ray Fluorescence Technique.

Front Chem 2019 22;7:152. Epub 2019 Mar 22.

Department of Radiation Measurement and Dose Assessment, National Institute of Radiological Science, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.

As a country's law stipulates the effluent standard uranium concentration in drainage water, the uranium concentration must be determined when drainage water is released from a uranium handling facility, such as the Fukushima Daiichi nuclear power plant. The maximum allowable limit for uranium release at each facility is defined taking into consideration the situation of the facility, such as 1/10 to 1/100 of this effluent standard value. Currently, the uranium concentration of drainage water is commonly determined by α-particle spectrometry, in which several liters of drainage water must be evaporated, requiring about half of a day followed by 2-3 h of measurements, due to the low specific radioactivity of uranium. Read More

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