论文信息 - Multielement analysis of unweighed oil samples by x-ray fluorescence spectrometry with two excitation sources

Multielement analysis of unweighed oil samples by x-ray fluorescence spectrometry with two excitation sources

A method has been developed to compute matrix corrections for unweighed oil samples from the combined results of two separate energy-dispersive X-ray fluorescence spectra from different (Ti K..cap alpha.., Zr Kchemically bond) excitation sources. The method utilizes the incoherent and coherent scatter intensities from the Zr-excited spectrum as a basis for multielement back-scatter/fundamental parameter matrix corrections for both spectra. The Ti-excited spectrum is collected in a helium atmosphere and provides more sensitive determination of elements in the Al-Ca range. The method utilizes thin film multielement calibrations of the spectrometer and permits the direct analysis of samples of varying unknown mass and composition with high accuracy and precision. 2 figures, 3 tables.

Khris B. Olsen | R. W. Sanders | Kirk K. Nielson | Walter C. Weimer

[1] L. Christensen,et al. Determination of sulfur and heavy metals in crude oil and petroleum products by energy-dispersive x-ray fluorescence spectrometry and fundamental parameter approach , 1981 .

[2] K K Nielson,et al. Matrix corrections for energy dispersive X-ray fluorescence analysis of environmental samples with coherent/incoherent scattered X-rays. , 1977, Analytical chemistry.

[3] R. Sanders,et al. Multielement analysis of unweighed biological and geological samples using backscatter and fundamental parameters , 1982 .

[4] Nielson. Application of direct peak analysis to energy dispersive x-ray fluorescence spectra , 1978 .

[5] R. W. Fink,et al. X-Ray Fluorescence Yields, Auger, and Coster-Kronig Transition Probabilities , 1972 .