UNIVERSITY OF MARYLAND   Electron Probe Microanalyzer (EPMA) JXA-8900

Electron Probe Microanalyzer Laboratory

This laboratory has equipment that is used for the chemical and spatial characterization of minerals and glasses in rocks. This equipment often serves as the primary analytical tool in many high-school, undergraduate and graduate research projects. For information about research opportunities and internships, please contact Phil Piccoli.

Electron Probe Microanalyzer (EPMA) JXA-8900

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Center for Microanalysis

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The JXA-8900 SuperProbe is a high resolution SEM and a WD/ED Combined Electron Probe Microanalyzer (EPMA). The combination of up tp 5 wavelength dispersive X-ray spectrometers (WDS) and an energy dispersive X-ray spectrometer (EDS) assures the most efficient and accurate analysis. Computer input analyzes data from the two types of X-ray spectrometers and presents the data as a unified analysis.

The WD/ED combined system can simultaneously analyze up to 13 elements (5 WDS, 8 EDS). The backscattered electron image, provided by a highly sensitive solid state detector, and the secondary electron image, brings the total obtainable signals to 15.

The WD/ED combined microanalyzer provides for:

  • higher detection sensitivity for trace elements
  • higher accuracy of quantitative analysis
  • higher resolving power (resolution) for adjacent X-rays
  • higher accuracy of quantitative analysis for light elements