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Some Biomedical Applications of Charged-Particle-Induced X-Ray Fluorescence Analysis

  • J. L. Campbell (a1), A. W. Herman (a1), L. A. McNelles (a1), B. H. Orr (a1) and R. A. Willoughby (a1)...

Abstract

X-ray fluorescence induced by charged particles has been employed in trace element analysis of both animal and human blood, tissue and bone samples. Preparation techniques included microtome slicing and wet digestion in nitric acid, internal chemical standards being used in the latter case.

Most of the specimens arose from a study of interactions between the toxic elements lead and zinc in growing foals; this was motivated by reports of sickness and death in foals raised near lead-zinc smelters. The cause of toxicity in animals from environmental pollution is often attributed to Single factors, whereas in reality interactions among many factors, including a variety of toxic and nutrient trace elements, should be considered.

A variety of spectra are presented and elemental concentrations derived. Agreement between the X-ray data and atomic absorption spectrophotometry is encouraging. The results demonstrate the potential of particle-excited X-ray fluorescenee as a broad-range analytical technique for the study of trace element interactions.

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1. Kliwer, J.J., Kraushaar, J.J., Ristinen, R.A., Rudolph, H and Smythe, W.R., “Trace Element Analysis by Observation of Characteristic X-rays”, Bull. Am. Soc. 17, 545 (1972).
2. Cooper, J.A., “Comparison of Particle and Photon-excited X-ray Fluorescence applied to Trace Element Measurements of Environmental Samples”, Nucl. Instr. Meth. 106, 525538 (1973).
3. Herman, A.W., McNelles, L.A. and Campbell, J.L., “Choice of Physical Parameters in Charged-particle-induced X-ray Fluorescence Analysis”, Int. J. App. Rad. in press.
4. Willoughby, R.A., MacDonald, E., McSherry, B.J. and Brown, G., “Lead and Zinc Poisoning and the Interaction between Lead and Zinc Poisoning in the Foal”, Can. J. Comp. Med. 36, 348359 (1972)
5. Herman, A.W., McNelles, L.A. and Campbell, J.L., “Target Backings for Charged-particle-induced X-ray Fluorescence Analysis”, Nucl. Instr. Met. 109, 429437 (1973).
6. Campbell, J.L., Herman, A.W., Orr, B.H. and McNelles, L.A., “Specimen Preparation and System Calibration in Proton-excited x-ray Fluorescence Analysis”, to be submitted for publication (1973).

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