نتایج جستجو برای: xrf method

تعداد نتایج: 1632639  

2011
J. Boman J. B. C. Pettersson M. Gatari A. Wagner P. Molnar

In this paper we will introduce the general benefits of X-Ray Fluorescence spectrometry (XRF) for assessing the condition of the outer environment, especially where ambient aerosol particles are causing environmental disturbances. Examples from recent environmental studies are presented, and energy dispersive XRF is concluded to be a powerful, nondestructive yet easily applicable tool to supply...

2002
T. Shoji T. Yamada Y. Kataoka B. Beckhoff G. Ulm M. Mantler

We have demonstrated the cascade effect and the secondary photoelectron excitation effect by means of Cr-L line measurements by using monochromatic radiation of high spectral purity and well-known flux provided by two beamlines of the Physikalisch-Technische Bundesanstalt (PTB), Germany's national institute of metrology at the electron storage ring BESSY II. The plane grating monochromator beam...

2011
E. Malicka R. Sitko B. Zawisza J. Heimann D. Kajewski A. Kita

The paper presents possibilities and difficulties in nondestructive analysis of small multielement single crystals performed by means of X-ray spectrometry techniques: micro-X-ray fluorescence spectrometry (μ-XRF), energy-dispersive electron probe microanalysis (ED-EPMA), and X-ray photoelectron spectroscopy (XPS). The capability of the X-ray spectroscopy techniques in elemental analysis is dem...

2018
Björn De Samber Eline Meul Brecht Laforce Boel De Paepe Joél Smet Michiel De Bruyne Riet De Rycke Sylvain Bohic Peter Cloetens Rudy Van Coster Peter Vandenabeele Tom Vanden Berghe

Synchrotron radiation based nanoscopic X-ray fluorescence (SR nano-XRF) analysis can visualize trace level elemental distribution in a fully quantitative manner within single cells. However, in-air XRF analysis requires chemical fixation modifying the cell's chemical composition. Here, we describe first nanoscopic XRF analysis upon cryogenically frozen (-150°C) fibroblasts at the ID16A-NI 'Nano...

2004
N. Tominaga J. Deng P. A. Mazzali K. Maeda K. Nomoto E. Pian J. Hjorth J. P. U. Fynbo

XRF 030723 is the first X-ray flash (XRF) to show in its optical light curve (LC) a bump that has been interpreted as the signature of a supernova (SN). After subtracting the afterglow component from the observed optical LC of the XRF counterpart, the properties of the SN are constrained by means of synthetic LCs of core-collapse SNe. For the range of redshift suggested for XRF 030723 (z ∼ 0.3 ...

2009
Kazuhiko NAKANO Kenta OKUBO Kouichi TSUJI

We have developed a convenient and effective XRF analysis procedure for trace amount of K, Ca, V, Mn, Fe, Ni, Cu, Zn, Cd, and Pb in environmental waters by using a preconcentration using the natural polymer (agar). The thin agar film was prepared by drying a homogeneous agar gel after mixing the aqueous sample solution with the agar powder. XRF analysis of the preconcentrated thin agar films co...

2015
Eva Vergucht Toon Brans Filip Beunis Jan Garrevoet Maarten De Rijcke Stephen Bauters David Deruytter Michiel Vandegehuchte Ine Van Nieuwenhove Colin Janssen Manfred Burghammer Laszlo Vincze

We report on a radically new elemental imaging approach for the analysis of biological model organisms and single cells in their natural, in vivo state. The methodology combines optical tweezers (OT) technology for non-contact, laser-based sample manipulation with synchrotron radiation confocal X-ray fluorescence (XRF) microimaging for the first time. The main objective of this work is to estab...

2006
K. Tsuji K. Tsutsumimoto K. Nakano K. Tanaka A. Okhrimovskyy X. Ding Xin Jie Kou Wai Da Jie

K. Tsuji, K. Tsutsumimoto, K. Nakano, K. Tanaka, A. Okhrimovskyy, Y. Konishi, and X. Ding Department of Applied Chemistry; Graduate School of Engineering; Osaka City University; 3-3-138 Sugimoto; Sumiyoshi-ku, Osaka 558-8585; Japan Telephone/Fax: +81-(0)6-6605-3080; E-mail: [email protected] 2) JST-PREST; 4-1-8 Honcho Kawaguchi, Saitama; Japan Institute of Low Energy Nuclear Physi...

Journal: :IOP Conference Series: Earth and Environmental Science 2018

2002
N.Kawahara T.Shoji

We have demonstrated the cascade effect and the secondary photoelectron excitation effect by means of Cr-L line measurements by using monochromatic radiation of high spectral purity and well-known flux provided by two beamlines of the Physikalisch-Technische Bundesanstalt (PTB), Germany's national institute of metrology at the electron storage ring BESSY II. The plane grating monochromator beam...

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