【摘要】 研究了采用共沉淀分离手段在氨性条件下分离大量铜基体并富集痕量硒、碲杂质的实验条件。优化选择了共沉淀剂的种类、浓度、氨水用量和温度等条件,考察了内标元素、铜残留浓度对ICP-MS测定的影响。与直接测定法相比,硒碲被富集了50倍,建立了共沉淀分离-ICP-MS测定高纯阴极铜中硒碲的方法。硒碲测定下限分别为0.08和0.10μg/g,RSD<10%,加标回收率在90%~115%之间。方法已用于实际样品分析。更多还原

【Abstract】 Experimental conditions that a great deal of copper matrices were separated as well as trace Se and Te were concentrated in ammoniacal solutions by co-precipitation separation were studied.Many conditions such as kinds and concentration of co-precipitator,ammonia volume and temperature were optimized and the influence of internal standard elements and copper residual concentration on ICP-MS were also investigated.Compared with direct determination of Se and Te,the elements were concentrated 50 folds and the determination limits for Se ane Te were 0.08 and 0.1(μg/g) respectively,the precision of measurement were RSD of less than 10% and the recoveries of standard addition were between 90%～115%.The method had been applied to red samples analysis with satisfactory results.更多还原