Optical Emission Spectroscopy

Chemist Setting Up OES Test

OES (Optical Emission Spectroscopy) analysis can quickly determine the chemical composition of various metal alloys. Often referred to as a "spark test," the method uses a sparking process where an electrical discharge is applied to the area being analyzed, causing a small amount of material to be vaporized. This sparking process causes a distinct chemical signature to be created allowing the skilled Chemistry staff at ATS to determine the elemental breakdown of the sample. Results are generally given in a percentage of each constituent element.

OES is an ideal and fast choice for determining the quantitative composition of solid metal components. ATS has the ability to analyze a variety of metal alloys such as low-carbon steels, alloy steels, corrosion-resistant steels, aluminum, nickel, and copper alloys.

Clients may send in sample materials for OES testing to confirm the identity alloy type before production, or as part of a failure analysis. In either circumstance, ATS can get you the answer that you need.


For over 50 years we have provided world-class testing, inspection and engineering consulting services to clients from a variety of industries. We are A2LA accredited to perform OES analysis to the relevant standards and ensure accurate results within a quick turn-around window. Let our experienced and qualified staff here at ATS handle your metals analysis needs.

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