Positive Material Identification (PMI) using OES Analyzer

OES analyzer can produce qualitative and quantitative analysis of the material composition. Although OES is considered a nondestructive testing method, the spark does leave a small burn on the sample surface.

OES instruments are larger in size and use argon gas to improve accuracy. Sample preparation plays an important role; however, there are almost no limitations to the instruments' ability to analyze elements typically used in metals. One of the key reasons OES technology is chosen instead of XRF is OES's superiority in the measurement of light elements in metals, such as carbon and aluminum. OES is the only reliable way to measure carbon outside of the laboratory, which commonly needs to be measured in materials like stainless steel, magnesium and silicon. The technology also is employed in the measurement of aluminum in aluminum alloys.