Equipment is described which consists of a combination of a scanning electron microscope with an x-ray microanalysis spectrometer, which permits the quick evaluation of the physical and chemical parameters of a given specimen. The physical data comes from the use of the SEM microscope and a Polaroid camera mounted on a special screen that magnifies as high as 100,000 times. The spectrum of elements found in a sample appear as a series of peaks indicative of the concentration and are recorded on a photograph. The analyzer takes the x-rays that radiate from the sample when bombarded by a high energy stream of electrons in a vacuum and sorts them out according to their energy. The EDXA results appear as a series of peaks on a TV tube. The results must be processed by a computer program system to be quantitative. The complex SEM-EDXA system can also map the distribution of a given element in a specimen. A spot analysis can select the elemental content of a single small grain and a line analysis across a sample reveals minute differences in the content of an element in a straight line.

  • Corporate Authors:

    National Ash Association

    1819 H Street, NW
    Washington, DC  United States  20006
  • Publication Date: 1975

Media Info

  • Features: Photos;
  • Pagination: 2 p.
  • Serial:
    • Ash at Work
    • Volume: 7
    • Issue Number: 3
    • Publisher: National Ash Association

Subject/Index Terms

Filing Info

  • Accession Number: 00128667
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1976 12:00AM