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What is Optical Emission Spectroscopy (OES)?
Optical Emission Spectroscopy (OES) is a method for chemical analysis of metals and alloys, often used in connection with Non-Destructive Testing (NDT) and quality control. The method works by applying a spark or arc to the surface of the item, creating a flash of light. The emitted light is separated in a spectrometer, and each elemental component is identified based on its characteristic spectral lines.
Optical Emission Spectroscopy (OES) is used in portable equipment.
In addition to general analysis capabilities, the equipment also enables sorting, i.e., comparison against a programmed standard, with the option to set a rejection level and activate either a visual or audible alarm at that threshold.
In practice, OES enables a rapid and precise determination of which elements (e.g., carbon, chromium, nickel, etc.) and in what quantities are present in the material. This way, one can ensure that a given metal or alloy grade meets the requirements or standards set in, for example, a production process or a certification procedure.
The advantages of OES include:
- Rapid and accurate analysis: The method can deliver precise information on metal content in just a few seconds.
- User-friendliness: Many OES devices are portable, making it possible to perform analyses on-site without having to remove samples for laboratory testing.
- Sorting and quality control: By comparing measurements with pre-programmed standards, you can automatically sort materials and intercept parts that do not meet specifications.
Demo of Quality Assurance with OES and XRF