Confirm material composition and identify contaminants through EDS
analysis. EDS (Energy-Dispersive Spectroscopy) is an analytical method based on
the differences in energy of the characteristic x-rays emitted by the various
elements. It is used in conjunction with scanning electron microscopy (SEM) to
identify the elements present at a particular spot on a sample. Advantages of
EDS are that it is easily performed and is reliable as a qualitative method.
Limitations are that it is only marginally useful as a quantitative method. (reference:
(reference: Dr. Zee)