电感耦合等离子发射光谱法测定稀土铁合金中铝量

Determination of the Contents of Aluminum in Rare-earth Ferroalloy with ICP-AES Method

样品经盐酸分解,草酸沉淀分离稀土,用电感耦合等离子发射光谱法测定溶液中铝量,测定结果的相对标准偏差小于3.0%,加标回收率90%～99%,检出限为0.045μg/mL。

By dissolving the sample in hydrochloric acid, the rare-earth is precipitated with use of oxalic acid and separated from aluminum in the solution. The determination of the content of aluminum in the solution is done with ICP-AES method. The conclusion is that the rate of recovery of aluminum is between 90% and 99%, the RSD of the method is less than 3% and the detection limit of the method is 0.045μg/mL.