Hostname: page-component-848d4c4894-ttngx Total loading time: 0 Render date: 2024-05-08T17:31:51.970Z Has data issue: false hasContentIssue false
  • English
  • Français

The Efficiency of the Recessed Source; Geometry for EDXRF Analysis of Metal Impurities in Oils

Published online by Cambridge University Press:  06 March 2019

J.M.F. dos Santos ,
C. A. N. Conde ,
L. F. Requicha Ferreira  and
A. J. De Campos
J.M.F. dos Santos
Affiliation:
Physics Department, University of Coimbra 3000 Coimbra, Portugal
C. A. N. Conde
Affiliation:
Physics Department, University of Coimbra 3000 Coimbra, Portugal
A. J. De Campos
Affiliation:
Physics Department, University of Coimbra 3000 Coimbra, Portugal
Get access

Abstract

The efficiency of the recessed source geometry for the analysis of the content of wear metals in engine lubricant oils by Energy Dispersive X-Ray Fluorescence (EDXRF) methods is calculated by a Monte Carlo simulation considering X-ray detectors of the Gas Proportional Scintillation Counter type and excitation by Cd-109, Cm-244 and Fe-55 radioactive sources. Calculated spectra for the case of a typical aircraft oil with Cu, Fe, Cr, Ti, Sn and Ag impurities in the p.p.m. range were obtained and results are presented that allow the prediction of the counting rate per mCi and p.p.m. of the impurity content. The performance of the system is discussed concerning its potential applications to in-line monitoring of the wear metals.

Type
V. XRF Applications; Fuels and Lubricants, Metals and Alloys, Geological, Heavy Element, Other
Information
Advances in X-Ray Analysis , Volume 30: Thirty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-8, 1986 , 1986 , pp. 237 - 241
Copyright
Copyright © International Centre for Diffraction Data 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Packer, L.L., Järvinen, M.-L. and Sipila, H., Application of Penning Mixture Proportional Counters for Gas T. r bine Engine X-Ray Fluorescence Spectrometer Wear Metal Monitor, Analytical Chemistry, 57, 1427–1433, 1985.Google Scholar
2. Maddox, W.E. and Kelliher, W.C., X-Ray Fluorescence Analysis of Wear Metals in Used Lubricating Oils, Advances in X-Ray Analysis, 29, 497–502, 1986.Google Scholar
3. Conde, C.A.N., dos Santos, J.M.F., The Recessed Source Geometry for Source Excited X. R. y Fluorescence Analysis, Advances in X. R. y Analysis, 29, 545–550, 1986.Google Scholar
4. Conde, C.A.N. and dos, J.M.F. Santos, The Gas Proportional Scintillation Counter as a Low Energy X-Ray Photon Detector for Industrial Applications, presented at the “12th Symposium of the IMEKO. echnical Committee TC-2 on Photon Detectors”, Varna, Bulgaria, 21-23 May 1986. Submitted for publication in the Proceedings of this Conference (CIE. ournal, 1986/87).Google Scholar
5. Isotope Products Laboratories, 1800 N. Keystone Street, Burbank, California 91504, U. S. A..Google Scholar