Ultra-trace analysis in complex metallic matrices: ICP-MS techniques for stainless steels and nickel-based alloys

This thesis investigates the application of Inductively Coupled Plasma Mass Spectrometry (ICP-MS) for the detection of tramp elements in stainless steels and nickel-based alloys produced by Acciaierie Valbruna. Tramp elements such as Pb, Bi, Sb, As, Sn, even at concentrations in the low ppm range, can severely affect mechanical properties, corrosion resistance, and weldability. The results demonstrate the effectiveness of ICP-MS as a reliable tool for monitoring impurities and supporting stringent quality control protocols in the steel industry.