二丁基亚砜固相萃取分离钯

Study on solid phase extraction for the separation of palladium by n-butyl sulfoxide system

研究了用MCI-GEL树脂分离富集钯的行为及与一些金属离子分离的条件。Pd(Ⅱ)与二丁基亚砜形成的配合物能被MCI-GEL树脂吸附,当溶液中二丁基亚砜、盐酸的浓度分别为2.5×10-2mol/L、0.1～0.2 mol/L时,Pd(Ⅱ)可与Pt(Ⅳ),Fe(Ⅲ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ)离子定量分离,Pd(Ⅱ)的萃取率达99%以上。

The behavior and conditions for the separation and enrichment of Pd from other metal ions by MCIGEL resin were studied.The results showed that the complex of palladium and n-Butyl sulfoxide formation of compound,can be adsorped by MCI-GEL resin,Pd could be quantitatively separated from Pt（Ⅳ）,Fe（Ⅲ）,Ni（Ⅱ）,Cu（Ⅱ）,Zn（Ⅱ） by adsorption.The extraction efficiency of Pd was higher than 99% when the concentrations of n-butyl sulfoxide and hydrochloric acid in solution ware 2.5 × 10-2mol / L and 0.1 ～ 0.2 mol / L,respectively.This method has been applied in the extraction separation and determination of Pd in synthetic water sample.