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Proton microprobe determination of fluorine depth distributions and surface multielement characterization in dental enamel

  • Physical Methods Section
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Abstract

Particle induced X-ray emission analysis (PIXE) and nuclear reaction analysis have been applied to multielemental analysis of human dental enamel in a proton microprobe. The PIXE technique was excercised for the characterization of multielemental lateral distributions on and just below the sample surface. For the assessment of depth distributions of fluorine the resonant nuclear reaction19F(p,aλ)16O was used. The combination of two analytical techniques comprising both atomic and nuclear interactions in a microprobe was applied to enamel samples of different origins. One sample constituted a healthy enamel and the other one enamel from a restored tooth. The microprobe in the combined mode was demonstrated to permit the establishment of lateral, concentration gradients of elements heavier than phosphorus with a resolution of 15 μm in enamel and simultaneously of depth distributions of fluorine better than 0.7 μm. The detection limits approached, 10–25 ppm for most of the elements considered.

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Authors and Affiliations

  1. Department of Physical Biology, Gustaf Werner Institute, Uppsala, Sweden

    U. Lindh

  2. Department of Dental Research, School of Dentistry, University of Bergen, Bergen, Norway

    Anne B. Tveit

Authors
  1. U. Lindh
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  2. Anne B. Tveit
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Supported by the Swedish Natural Science Research Council

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Lindh, U., Tveit, A.B. Proton microprobe determination of fluorine depth distributions and surface multielement characterization in dental enamel. J. Radioanal. Chem. 59, 167–191 (1980). https://doi.org/10.1007/BF02516846

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  • DOI: https://doi.org/10.1007/BF02516846

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