Results 251 to 260 of about 7,406,515 (293)

Determination of silicon in organic matrices with grazing-emission X-ray fluorescence spectrometry

Spectrochimica Acta Part B: Atomic Spectroscopy, 1999
Abstract The potential of a prototype grazing-emission X-ray fluorescence spectrometer for reliable analysis of sample solutions, obtained by pressurized microwave oven digestion of Si-spiked organic and biological materials, was investigated as part of an inter-laboratory study.
Claes, M., van Dyck, K., Deelstra, H., Van Grieken, R.   +3 more
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Focusing of soft X-ray radiation and characterization of the beam profile enabling X-ray emission spectrometry at nanolayered specimens

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, M. Müller, B. Beckhoff, P. Hönicke, B. Pollakowski, S. Bjeoumikhova   +5 more
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X-Ray Secondary-Emission (Fluorescence) Spectrometry; General Introduction

1975
Having considered the excitation, nature, and properties of x-rays and x-ray spectra, we now begin our study of the application of x-ray spectra to chemical analysis. However, first we define some terms used throughout the book.
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Proton-induced X-ray emission (PIXE) spectrometry — state of the art

Fresenius' Zeitschrift für analytische Chemie, 1986
The development of the PIXE method for multielemental analysis is described. A brief account is given of the physical principles and the experimental arrangements. The use of PIXE is illustrated by a number of typical applications in geology, biology, medicine and environmental research.
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Influence of irradiation time on the usability of briquetted samples in X-ray emission spectrometry

Fresenius' Zeitschrift für Analytische Chemie, 1985
The influence of X-ray radiation on samples of organic binders (starch, graphite and cellulose) and briquetted samples of sinter and sinter mixture of blast furnace charge was examined. The time of irradiation by the primary X-ray beam was from 0 to 300 min.
Vj. Novosel-Radović, Da. Maljković, N. Nenadić   +2 more
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Direct Assay for Molybdenum and Ruthenium in Uranium Alloys by X-Ray Emission Spectrometry

Advances in X-ray Analysis, 1957
AbstractIt has been found possible to determine quickly the concentrations of molybdenum and ruthenium in non-radioactive alloys representative of high burn-up reactor fuels by the method of X-ray emission spectrometry. Preliminary steps of chemical dissolution and separation are not required.
D. S. Flikkema, R. V. Schablaske
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Applications of wavelenght-dispersive spectrometry in particle-induced X-ray emission analysis

Nuclear Instruments and Methods, 1977
Abstract The high-resolution cpabilities of wavelenght-dispersive spectrometry can be profitably employed in the analysis of materials containing elements which cannot be early resolved by Si(Li) spectrometers. This situation frequently arises in cases where the concentration of an element must be determined in the presence of large quanities of ...
R.L. Watson, A.K. Leeper, B.I. Sonobe
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Application of X-ray emission spectrometry to the estimation of the heavy elements (at. no. 79–83)

Microchemical Journal, 1963
Abstract A study with the X-ray spectrometer of the conditions required for the estimation of microgram quantities of the elements gold, mercury, thallium, lead, and bismuth is described. Scanning of the range from 26 ° to 38 °C (2θ) permits the resolution of the L α and L β lines of these elements.
Samuel Natelson, Paritosh K. De
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Radiation effect on the binder of briquetted samples in x-Ray emission spectrometry

1998
In this paper the behaviour of boric acid as binder was investigated. On basis of debyegrams and secondary electron micrographs radiolytic changes of boric acid were proved. Debyegrams of sample of boric acid showed that spottiness and prefered orientation were enhanced after exposure of sample to x-Rays.
Novosel-Radović, Vjera, Maljković, Darko   +1 more
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Gas Analysis by X-Ray Fluorescence Emission Spectrometry.

Analytical Chemistry, 1965
C. R. Hudgens, George. Pish
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