Energy Dispersive X-Ray Spectroscopy (EDS/EDX)

EDS or EDX uses an electron beam and X-ray detector to determine the elemental composition of a sample. It is appropriate for metals, ceramics, and other materials, analyses sample material for a variety of reasons, and necessitates sample drying. For eligibility and benefits, contact Infinita Lab.

Atoms in a sample are stimulated by an electron beam using a scanning electron microscope (SEM) with an X-ray detector. When this beam interacts with the atom, it pushes an electron out of its shell and creates a void in the process. This hole is filled by another electron from a higher energy level in the lower orbital. The amount of energy released during this process depends on how many shells the replacement electron has moved from its original site, as well as which shell it travels to. The detector transforms the x-rays that are released from this energy into electricity. Counts corresponding to the number of x-rays at each energy level make up the final data. While the proportionate counts relate to the amount of the element, the energy level of the emitted X-rays links to specific elements.

The transition from the L shell to the K shell would result in a K emission, as depicted in the diagram. A K emission would result if the identical K location were filled from the M orbital. Although beta () emissions have more energy than alpha () emissions, they can reveal additional information about the material being studied. Even though the emission energies of some elements may overlap, secondary or “or” emissions can be used to tell one element from another. A sample’s composition or unknown particles can be identified using the cumulative spectrum of an element’s emission energies because it is specific to that element.

For elements with atomic masses, 12 (Carbon) and higher, EDS technology from Particle Technology Laboratories helps assess the elemental composition of sample material. It may also be used to quantify the elemental composition of a sample. Findings can be applied for a variety of purposes, including reformulation, identifying foreign materials, and troubleshooting processes.

It should be noted that sample material must be able to be dried down before analysis for EDS to be used. Metals, metal oxides, unknowns, medicines, proteins, ceramics, and more are among the material kinds we test.

Advantages

• Elemental make-up
• Focus on specific particles
• identifying metal atoms

Considerations

• The particle needs to be dry before analysis.
• determines the elemental composition of elements with atomic masses of 12 and higher (carbon).
• This method does not provide a comprehensive chemical composition analysis.
• Background noise altering composition percentages from smaller materials

Different Emerging Technologies

Emphasizing a collaborative approach to both areas, the promise of X-ray techniques is highlighted for tracking the structure, and active site of single-atom catalysts (SACs). Almost all transition metals can be studied using X-ray absorption spectroscopy which is XAS and related X-ray techniques, which have become exciting tools for solids characterization. By using these techniques, one can learn about the symmetry, oxidation state, local coordination, and a host of other structural and electronic properties. In the field of heterogeneous catalysis, SACs—a recently invented concept—have received a lot of interest lately.