Energy Dispersive X-Ray Spectroscopy

When investigating material failures, contamination, or composition, knowing what a material looks like is only part of the picture. You also need to understand what it is made of.

Without accurate elemental analysis, issues such as unexpected contaminants, incorrect formulations, or coating inconsistencies can remain unresolved. This can lead to product failures, quality issues, and delays in development or investigation.

Energy Dispersive X-ray Spectroscopy (EDS/EDX) provides fast, reliable elemental analysis, helping you identify materials, detect contaminants, and support confident decision making.

What EDS Analysis Involves

Energy Dispersive X-ray Spectroscopy is an analytical technique used to determine the elemental composition of a material. It is most commonly performed alongside Scanning Electron Microscopy.

When a material is exposed to a focused electron beam, it emits X-rays that are characteristic of the elements present. EDS detects these signals to identify and quantify elements.

EDS can provide:

• Elemental identification
• Approximate composition percentages
• Elemental mapping across a surface
• Localised analysis of specific features or particles

This makes it a powerful tool for both routine analysis and complex investigations.

Methodology

At Impact Solutions, EDS analysis is performed using advanced instrumentation, often in combination with SEM imaging for detailed correlation between structure and composition.

A typical EDS programme includes:

1. Sample preparation, which may include mounting or coating if required.
2. Placement in an SEM chamber under vacuum conditions.
3. Scanning with an electron beam to excite the sample.
4. Detection of emitted X-rays using an EDS detector.
5. Generation of spectra showing elemental peaks.
6. Optional elemental mapping or point analysis of specific areas.
7. Interpretation and reporting with clear identification of elements and distribution.

The approach can be tailored depending on whether the goal is identification, comparison, or investigation.

Relevant Industry Applications

EDS analysis is widely used for:

• Failure analysis and root cause investigation
• Contamination identification
• Coatings and surface composition analysis
• Plastics and polymer additives
• Electronics and component analysis
• Metals, composites, and advanced materials

Benefits of EDS Analysis

• Provides rapid identification of elemental composition
• Supports root cause analysis and troubleshooting
• Detects contamination and unexpected materials
• Enables correlation with SEM imaging for deeper insight
• Requires minimal sample preparation
• Delivers clear, visual and quantitative data

Need to identify what your material is made of or investigate contamination?

Contact Impact Solutions to discuss EDS analysis and gain clear, reliable insight into your material composition.

FAQ

Q: What is the difference between EDS and SEM?
SEM provides high resolution images of a material’s surface, while EDS provides information about its elemental composition.

Q: Can EDS identify unknown materials?
Yes. EDS can identify the elements present, which helps determine the nature of unknown materials or contaminants.

Q: Is EDS quantitative?
EDS provides semi-quantitative results, giving approximate concentrations of elements rather than precise chemical analysis.