有色金属(冶炼部分)

基于二苄基亚砜树脂与钯的络合反应,建立了一种高选择性吸附痕量钯的方法。在0.1⁶ mol/L的盐酸介质中,钯可以被二苄基亚砜树脂吸附富集并形成1∶1稳定络合物,该络合物可用50 g/L酸性硫脲洗脱,洗脱液经处理后用分光光度法测定,树脂结构不被破坏且可重新处理使用。方法用于测定催化剂中痕量钯,结果与原子吸收分光光度法测定结果一致,相对标准偏差RSD为0.61%¹.47%(n=5),标准加入回收率96%~100%。

On the basis of complex reaction of dibenzyl sulfoxide resin with palladium,a high selective method of solid phase extraction for the determination of trace palladium was developed.In 0.1⁶.0 mol/L HCl medium,palladium could be adsorbed and enriched by dibenzyl sulfoxide resin and a stable complex with ratio of 1∶1 was formed.The complex could be eluted by 50 g/L of acidic thiourea,the eluent was determined by the spectrophotometry and the structure of resin was kept well,which could be retreated and reused readily.The method has been applied to the determination of trace palladium in the samples with RSD of 0.61%¹.47%(n = 5) and recovery of 96%~100 %.The results were consistent with those obtained by AAS method.