ELECTRONIC ASH ANALYSIS SET TO PROVIDE RAPID RESULTS

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

• TRT Terms: Analysis; Cameras; Chemical elements; Chemical properties; Computer programs; Electron microscopes; Equipment; Physical properties; Quantitative analysis; Spectrometers; X ray analysis
• Uncontrolled Terms: Rapid methods
• Old TRIS Terms: Ashes
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

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