阳离子交换分离ICP-AES法测定高放废液中微量钌、铑、钯

A DETERMINATION METHOD OF Ru, Rh AND Pd IN HIGH-LEVEL LIQUID WASTE(HLLW) BY CATIONEXCHANGE SEPARATION AND ICP-AES MEASUREMENT

摘要: 用盐酸及氯化钠处理后的高放废液试样,通过强酸型阳离子交换树脂柱,杂质元素被吸附在树脂上,Ru、Rh和Pd以氯络阴离子形式存在,流入淋洗液中。分离纯化后的试液用ICP-AES法测定其中Ru、Rh和Pd的含量。Ru含量在(35—230)×10~(-6)范围内,重加回收率为90％,相对标准偏差(RSD)为6％;Rh含量在(2—20)×10~(-6)时,重加回收为106％,RSD为10％;Pd含量小于2×10~(-6)时重加回收为72％。

Abstract: The paper describes a determination method of Ru. Rh and Pd in HLLW with cation-exchange separation and ICP-AES measurement. A sample of HLLW was treated with the hydrochloride acid containing enough sodium chloride, then passed through a strongly acidic cation-exchange resin col umn, the Ru, Rh and Pd as ehloro-complexs go to the eluate while the interference elements are ab sorbcd on the resins in the column. The Ru, Rh and Pd are collected and determined by ICP-AES. The obtained results show that the recovery is 90％ and the relative standard deviation is 6％ as the Ru con tent within the range (35—230)×10~(-6) the recovery is 106％ and RSD is 10％ as the Rh content within (2 20)×10~(-6); and the recovery of Pd is 72％ as its content less than 2×10~6.