The detection limits for ETV ICP AES determinations of Sc, Y, La and Yb with PMBP as a chemical modifier are 14, 32, 190 and 26 pg/mL. The relative standard deviations were 3.1%, 3.5%, 4.8% and 3.4% for Sc, Y, La and Yb, respectively ( n =9, c =10 ng/mL).

• 在优化的实验条件下 ；方法的相对检出限为 1 4 pg/m L( Sc) ；32 pg/m L( Y) ；1 90 pg/m L( La)和 2 6pg/m L ( Yb) ；相对标准偏差 ( RSD)分别为 3.；1%25；3