本文叙述了用阳离子交换分离-水平式ICP-AES法测定Zr-Nb合金中微量Gd、Sm、Dy和Eu。用HF溶样,以H_2SO_4转化成硫酸盐后,通过阳离子交换树脂柱,先后以2NH_2SO_4及2N HCl淋洗,将稀土元素与基体锆及其他元素分离后,再以6N HCl解吸 This paper describes the determination of trace amounts of Gd, Sm, Dy and Eu in Zr-Nb alloys by cation exchange separation-horizontal ICP-AES. After the sample was dissolved in HF and converted to sulfate with H 2 SO 4, it was passed through a cation exchange resin column and eluted with 2NH 2 SO 4 and 2N HCl. The rare earth element was separated from the matrix zirconium and other elements and then desorbed with 6N HCl