Results 211 to 220 of about 40,232 (263)
Some of the next articles are maybe not open access.
Determination of selenium in blood components by X-ray emission spectrometry
Biological Trace Element Research, 1990Abstract: Sampling, storing, sample pretreatment, and experimental conditions for selenium (Se) determination in human serum, plasma, and whole blood by X-ray emission spectrometric (XRS) methods are described. Concentration levels in these biological fluids, found by this technique, are discussed and compared to values found by other techniques for ...
Robberecht, H. +2 more
openaire +4 more sources
Importance of sample grinding time in X‐ray emission spectrometry
X-Ray Spectrometry, 1987Abstract The effect of the sample grinding time on X‐ray spectrometric results was examined on real samples (limonite iron ore, sinter mixture and blast furnace slag). Comparative results were obtained for X‐ray diffraction analysis and scanning electron microscopic analysis.
V. J. Novosel‐Radović +1 more
openaire +1 more source
Innovations in X-Ray Induced Electron Emission Spectrometry (XIEES)
Key Engineering Materials, 2010In modern sciences and technologies it is required to investigate local atomic and electron structure of matter independently on its aggregate state. There are advanced methods aimed at short order. These methods are based on the phenomena accompanied by interference of secondary electrons excited by primary X-ray radiation.
Konstantin J. Pogrebitsky +1 more
openaire +1 more source
Analytica Chimica Acta, 1983
Selenium is determined in the ng g−1 to μg g−1 range in biological and environmental samples. A wet digestion procedure was optimized with respect to volatility losses and recovery yields, by using 75Se metabolically incorporated into rat organs. Selenium is preconcentrated from the digestion liquid by a two-step reduction with 4 M HCl and ascorbic ...
Robberecht, H., Van Grieken, R.
openaire +2 more sources
Selenium is determined in the ng g−1 to μg g−1 range in biological and environmental samples. A wet digestion procedure was optimized with respect to volatility losses and recovery yields, by using 75Se metabolically incorporated into rat organs. Selenium is preconcentrated from the digestion liquid by a two-step reduction with 4 M HCl and ascorbic ...
Robberecht, H., Van Grieken, R.
openaire +2 more sources
Determination of Catalyst Residues in Polyolefins by X-Ray Emission Spectrometry.
Analytical Chemistry, 1962AbstractX-ray fluorescence methods for the direct determination of aluminum, chlorine, titanium, and iron in polyolefins have been developed. The procedures require no preconccntration of elements, are satisfactory for any polyolefin, and are free from matrix effects.
G. D. Smith, R. L. Maute
openaire +1 more source
Determination of carbon and fluorine in rocks and minerals by X-ray emission spectrometry
Spectrochimica Acta Part B: Atomic Spectroscopy, 1971Abstract Determinations of trace fluorine and minor carbon concentrations in rocks and micas using an X-ray spectrometer with scanning electron beam excitation are described. The analyses were made on briquetted samples which had been mixed with 25 per cent by weight of copper powder.
A.B. Poole, E.D. Pickard, D. Lawrence
openaire +1 more source
Analysis of phospholipids by thin-layer chromatography and X-ray emission spectrometry
Journal of Chromatography A, 1972The use of X-ray emission spectrometry for in situ quantitative analysis of phospholipids after separation by two-dimensional thin-layer chromatography is described. With this procedure, microgram quantities of phospholipids can be analyzed.
openaire +2 more sources
Spectrochimica Acta Part B: Atomic Spectroscopy, 2004
Abstract A wavelength-dispersive X-ray fluorescence spectrometer incorporating a novel X-ray source with which X-rays are generated by means of light pulses from a powerful femtosecond laser is described. The instrument has been designed in order to explore whether laser-induced X-rays can replace conventional X-ray sources in the examination of ...
H. Schwenke +4 more
openaire +1 more source
Abstract A wavelength-dispersive X-ray fluorescence spectrometer incorporating a novel X-ray source with which X-rays are generated by means of light pulses from a powerful femtosecond laser is described. The instrument has been designed in order to explore whether laser-induced X-rays can replace conventional X-ray sources in the examination of ...
H. Schwenke +4 more
openaire +1 more source
Spectrochimica Acta Part B: Atomic Spectroscopy, 2012
Abstract For the analysis and speciation of nanoscaled materials, an efficient detection in high-resolution X-ray emission spectrometry is needed. Therefore, the focusing of monochromatized soft X-ray undulator radiation with a single bounce monocapillary down to micrometer range is reported.
R. Unterumsberger +5 more
openaire +1 more source
Abstract For the analysis and speciation of nanoscaled materials, an efficient detection in high-resolution X-ray emission spectrometry is needed. Therefore, the focusing of monochromatized soft X-ray undulator radiation with a single bounce monocapillary down to micrometer range is reported.
R. Unterumsberger +5 more
openaire +1 more source
Analytical Chemistry, 1984
A method is described for the determination of Cr/sup 3 +/ in blood serum by proton-induced X-ray emission (PIXE) after wet ashing and an extractive enrichment procedure. Wet ashing of 5 to 10 mL of human plasma is carried out with nitric, perchloric, and sulfuric acids.
Simonoff, M. +3 more
openaire +3 more sources
A method is described for the determination of Cr/sup 3 +/ in blood serum by proton-induced X-ray emission (PIXE) after wet ashing and an extractive enrichment procedure. Wet ashing of 5 to 10 mL of human plasma is carried out with nitric, perchloric, and sulfuric acids.
Simonoff, M. +3 more
openaire +3 more sources