乙醇-硫酸铵双水相萃取镉-碘化钾-罗丹明B离子缔合物  

Extraction of cadmium-potassium iodide-rhodamine B ion association complex by alcohol-ammonium sulfate aqueous two-phase

作　　者：曾云[1] 覃事栋[1] 姚康康[1] 王影[1] 肖苗[1] 

机构地区：[1]吉首大学化学化工学院,吉首416000

出　　处：《分析试验室》2012年第4期83-85,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了在(NH4)2SO4存在下,碘化钾-罗丹明B-乙醇体系萃取Cd(Ⅱ)的行为及最佳分相条件。实验表明,在pH 1～3时,乙醇-(NH4)2SO4双水相体系对[CdI4]2-络阴离子的萃取率只有35.5%;加入罗丹明B后,该体系能完全萃取镉-碘化钾-罗丹明B形成的离子缔合物,而干扰离子Zn2+、Fe3+、Co2+、Cu2+、Ni2+不被萃取,实现Cd2+与上述离子的分离。In the presence of ammonium sulphate,the extraction behavior of Cd（II） based on potassium iodide-Rhodamine B-alcohol system was studied and the optimal condition of phase separation was selected.Results showed that in the pH1-3 media,the extraction rate of 2– by alcohol-ammonium sulfate aqueous two-phase system is only 35.5%,and the ion association complex,which is formed by adding rhodamine B,can be extracted completely by the aqueous two-phase system.In the system,Cd2＋ can be dissociated completely from Zn2＋,Fe3＋,Co2＋,Cu2＋ and Ni2＋.

关 键 词：双水相 萃取 光度法 镉 离子缔合物 

分 类 号：O652.62[理学—分析化学]