Several analytical techniques could be adopted during the production and testing of metals and work pieces in the Metals
For Metal Processing Optical Emission Spectrometry (OES) using Arc/Spark excitation is the traditional reference technique for fast and accurate  elemental analysis of solid metallic samples.
ELS, provides solution for testing Aluminum Electrolytic Bath by a combination of XRD and XRF techniques. Moreover the analysis of precious metals could be performed with a non-destructive technique using XRF spectrometer, For scrap analysis ELS, offers a Hand Held XRF analyzer.