The LIBS technique – laser induced breakdown spectroscopy is like OES, LIBS delivers very accurate chemistry provided it’s operated in an argon purge environment, although it is available with a lower cost air-burn option. You want to measure carbon in alloys, and LIBS is the only handheld analyzer on the planet that accomplishes this. LIBS offer in-field analysis of key elements Li, Be, C, B, Na, Mg, Al, Si, Ca in addition to transition and heavy metals. Can use to measure CARBON in alloys. There is no radiation.