Results 171 to 180 of about 4,724 (207)

The Fast Analysis of Uranium Ore by EDXRF

Advances in X-ray Analysis, 1979
AbstractEnergy dispersive X-ray fluorescence (EDXRF) spectrometry has been applied to the high speed analysis of uranium ore for the purpose of grading and sorting truckloads of ore at the mine. The system is able to analyze uranium ore in less than 60 seconds with uranium levels ranging from < 0.005% to > 5% U3O8.
Ronald A. Vane, William D. Stewart, Mike Barker   +2 more
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EDXRF analysis of Marajoara pubic covers

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007
This work evaluated the elemental composition of decorated pottery pubic covers (tangas) from the Marajoara culture of Marajo Island (at the mouth of the Amazon River, Brazil) using EDXRF technique. The XRF system used in this work consists in a Si(Li) detector from ORTEC, with resolution of 180 eV, at 5.9 keV, and a mini X-ray tube with Mo anode.
C. Calza, M.J. Anjos, M.I.M.S. Bueno, T.A. Lima, R.T. Lopes   +4 more
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EDXRF studies on Chinese Yue ware

X-Ray Spectrometry, 2002
Abstract Abstract The major and trace element composition of Chinese Yue ware, widely recognized as the earliest Chinese porcelain (probably the earliest worldwide), is analysed using non‐destructive, energy‐dispersive x‐ray fluorescence (EDXRF).
J Wu, J. P.L Leung, Z. Li, M. J. Stokes
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Full spectrum calculations of EDXRF spectra

Powder Diffraction, 2006
Rapid and accurate methods are becoming available to calculate all of the relevant physical effects that contribute to an energy-dispersive X-ray fluorescence (EDXRF) spectrum, rather than just the characteristic line intensities given by the traditional fundamental parameters method. To evaluate the utility of such methods, we have calculated the full
W. T. Elam, Bob Shen, Bruce Scruggs, Joseph Nicolosi   +3 more
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Determination of phosphorus in waste water by EDXRF

Fresenius' Journal of Analytical Chemistry, 1992
In a method developed for the determination of phosphorus in aqueous solutions, phosphorus was changed to the phosphate form, coprecipitated with hydrated iron(III) oxide, bound with activated charcoal and measured by EDXRF. The detection limit was 0.89 mg P/g activated charcoal.
Sirpa Per�niemi, Jouko Veps�l�inen, Heikki Mustalahti, Markku Ahlgr�n   +3 more
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EDXRF Spectroscopy of Ink-jet Materials

2005
Energy Dispersive X-Ray Fluorecsence (EDXRF) spectroscopy represent a qualitative analysis of the ash-samples. This method enables us to determine concentrations of elements in the ashes (Pb, Rb, Sr, Y, Zr, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Co). Ash-samples were prepared from several different papers and also from Ink-Jet prints made on the same ...
Lozo, Branko, Oreščanin, Višnja, Barbarić-Mikočević, Željka, Muck, Tadeja   +3 more
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ANALYSIS OF COPPER COINS BY EDXRF TECHNIQUE

International Journal of PIXE, 2004
Coins are important archaeological objects that can provide useful information regarding preparation methodology and provenance. Their classification plays a fundamental role in dating historical events, in constructing trade routes and in establishing the welfare of population.
T. R. RAUTRAY, V. VIJAYAN, P. K. NAYAK, S. JENA   +3 more
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Capabilities of elemental analysis by EDXRF for geochemistry

Journal of Radioanalytical and Nuclear Chemistry, 2007
Elemental analyses of 10 geological samples from Morocco and some Standard Reference Materials were performed by Energy Dispersion X-Rays Fluorescence, Wavelength Dispersion X-Rays Fluorescence and Neutron Activation Analysis techniques in order to assess the accuracy and sensitivity of the concentrations determined with regard to requirements in ...
Bounakhla, Moussa, Embarch, K., Zahry, Fatiha, Bilal, Essaid, Kump, P.   +4 more
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An EDXRF study of the photodecomposition of diorganyl ditellurides

Radiation Physics and Chemistry, 2006
Abstract An EDXRF set-up has been used to generate mechanistic information on the photolytic and physicochemical events leading to deposition of free elements from various diorganyl ditellurides in different solvents and in a microemulsion system. The method is characterized by the use of 59.54 keV γ-rays as a monoenergetic radiation source and the ...
Manju Sharma, K.K. Bhasin, S.K. Mehta, Nirmal Singh, Sanjeev Kumar   +4 more
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Fit of EDXRF spectra with a genetic algorithm

X-Ray Spectrometry, 2001
Abstract In energy‐dispersive x‐ray fluorescence analysis, the estimation of the net area of the peaks is a primary requirement. This task requires a non‐linear fitting of the peaks. The most common procedures are based on the Marquardt– Levenberg technique. This technique generally works well only when the spectrum is perfectly known,
A. BRUNETTI, GOLOSIO, BRUNO
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