0.25 g赤泥样品经3 g氢氧化钠熔融20 min，再用热水浸取和盐酸（1+1）溶液20 mL提取，最后用水定容至250 mL。采用电感耦合等离子体原子发射光谱法测定其中镧、铈、镨、钕、钪、钇等6种稀土元素的含量。6种稀土元素的质量浓度均在2.00 mg·L^-1以内与其对应的发射强度呈线性关系，方法的检出限（3s）为0.001 8~0.042 mg·L^-1。方法用于赤泥样品的分析，加标回收率为85.0%~105%，测定值的相对标准偏差（n=6）为0.24%~0.70%。

0.25 g of red mud sample was melted with 3 g of NaOH for 20 min and then was extracted with hot water and 20 mL of HCl (1+1) solution. Finally the solution was diluted to 250 mL with water. The 6 rare earth elements, i.e. La, Ce, Pr, Nd, Sc and Y in the solution were determined by ICP-AES. Linear relationships between values of emission intensity and mass concentration of the 6 rare earth elements were kept in the same range within 2.00 mg·L^-1, with detection limits of the method (3s) in the range of 0.001 8-0.042 mg·L^-1. The proposed method was applied to the analysis of red mud sample, giving values of recovery and RSD's (n=6) in the ranges of 85.0%-105% and 0.24%-0.70% respectively.