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鑭、鈰、鐠、釹、釤、銪、釓、鋱、鏑、鈥、鉺、銩、鐿、镥、釔 La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y 100μg/ml 介質1.0 mol/L  HNO3 (1.0摩爾/升硝酸)