稀土发火材料中稀土总量的快速测定

The rapid method for determination of total rare earth contents in rare-earth fire materials

采用盐酸、硝酸和高氯酸溶解稀土发火材料样品,过氧化氢消除铁离子影响,草酸沉淀稀土,重量法测定稀土总量.该法的加标回收率为99.30%～100.50%,标准偏差为0.054%,相对标准偏差为0.071%.本方法操作简单、快速,结果准确.

Based on the dissolution of the rare-earth fire materials by hydrochloric acid and nitric acid and perchloric acid, eliminating effect of iron ion by hydrogen peroxide, and subsequent precipitation by oxalic acid, the total rare earth contents were determined by gravimetric method. The recovery rate was 99.3% - 100.5%, with standard deviation of 0. 054%, and relative standard deviation of 0. 071%. The operation was simple and convenient, and accurate results could be obtained quickly.