【摘要】 建立了一种利用P50 7树脂微柱在线分离预浓集 -同位素稀释 -电感耦合等离子体质谱测定地质样品中铕的方法。样品消耗量为 7.5mL时 ,实现了 1 6倍的预浓集因数。通过分析标准地质样品验证了该方法的可行性 ,结果与标准值一致 ,相对标准偏差 (n =5 )为 6.9%～ 9.2 %。用于分析重晶石样品并作加入回收实验 ,进一步验证了该方法的可行性 ,回收率为 82 %～ 98%。该方法测定Eu的检出限为 2 2ng/L。更多还原

【Abstract】 A method for the determination of europium by ID ICP MS after on line separation and preconcentration with P 507 microcolumn was developed. The enrichment factor is 16 with sample consumption of 7.5 ?mL.Validity of the method was examined by the determination of europium in geological standard reference materials. The results are in good agreement with certified values with precision of 6.9%～9.2% RSD( n =5). To further verification of the validity of this method, a barite sample has been determined and the recovery is 82%～98%. The detection limit of this method for europium is 22?ng/L.更多还原