聚冠醚的合成与性质Ⅳ．微量镉的分离、富集与测定

Synthesis and property of polycrown ethers (Ⅳ)

报道了以新的双酚Ａ型聚冠醚为交换柱的固定相，分离、富集并测定微量镉离子的方便而满意的方法。

Trace cadmium ion is collected and determinedby polycrown ether as a new ion-exchange resin.In the medium of 0.03mol/L KI, at pH5, theabsorption efficiency for Cd2+ is more than 98%and Cd2+ can be eluted off with 0.5mol/LHCl. The method is simple and the results aresatisfactory.