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Scanning Electron Microscopy (SEM)


A scanning electron microscope is used to determine the topographical image or make-up of a sample. It has a greater depth of field, higher resolution and higher magnification than an ordinary optical microscope. It is relatively easy to use and is widely-used in almost all research areas. The SEM only produces high-resolution images of the sample surface.  Therefore, the internal structures of the sample cannot be determined unless a cross-section is performed.



Energy Dispersive Spectroscopy (EDS)


Energy Dispersive Spectroscopy (EDS) is a standard method of identifying and quantifying elemental composition of sample surfaces. The characteristic x-rays are produced when the sample is bombarded with electrons in an electron beam instrument such as a scanning electron microscope. Detection of these x-rays and discrimination of the x-ray energies can be accomplished by an energy dispersive spectrometer.

Suspect Pure Tin on the surface of your part?  EDS can validate your suspicion.



Applicable Specifications & Standards:

  • ASTM E1829, Standard Guide for Handling Specimens Prior to Surface Analysis
  • ASTM E1508, Standard Guide for Quantitative Analysis by Energy-Dispersive Spectroscopy