Determination of Ultra-Trace Scandium, Yttrium and Rare-Earth Elements in High-Purity Iron by High-Resolution Inductively Coupled Plasma-Mass SpectrometryTetsuya Ashino, Kunio Takada, Kazuaki Wagatsuma and Kenji AbikoMatériaux & Techniques, 91 (2003) 31-36DOI: https://doi.org/10.1051/mattech/200391120031s
