ICP-AES测定地质样品中的多种稀土元素

Determination of Multiple Rare Earth Elements in Geological Samples by ICP-AES

地质样品用碱熔后,三乙醇胺掩蔽铁、铝,EDTA络合钙、钡,过滤后用HCl+H_2O_2溶解沉淀,经强酸性阳离子交换树脂分离富集,盐酸洗提,定容后用ICP-AES测定多项稀土元素,此方法准确性好,RSD均小于5%,灵敏度高。

The geological samples were first fused with Na2O2,Triethanolamin and EGTA were used to cover iron and aluminum and interact with calcium and barium respectively so as to from complexes. The filtrated residue was dissolved by HCl＋H2O2,and separated and concentrated through strongly acidic cation-exchange resin, then eluted by HC1. After metered the volume,the multiple rare earth elements were determined by ICP-AES. The method has good accuracy and sensitivity, with RSDs all less than 5 %.