浊点萃取结合电感耦合等离子体-原子发射光谱法富集测定矿泉水中钐等7种稀土元素

Preconcentration and Determination of Rare Earth in Mineral Water Using CPE-ICP-AES

采用浊点萃取技术实现7种稀土元素的预富集,结合电感耦合等离子体-原子发射光谱法对矿泉水中钐、铕、钆、铽、钬、镱和镥元素进行检测,各元素的检出限在0.005-0.033μg/mL。范围内,加标回收率为90%-105%,相对标准偏差(n=3)为1.7%-6.4%。

A method for preconcentration and determination of rare earth was established.Based on cloud point extraction,the proposed method was applied for lanthanides determination in mineral water,including Sm,Eu,Gd,Tb,Ho,Yb and Lu.The detection limits was in the range from 0.005 to 0.033μg/mL,and the recoveries of standards in mineral water sample were from 90%to 105%,with the RSDs of 1.7%-6.4%.