摘要
研究加入表面活性剂乙基紫(EV)后,在丙醇-水双水相体系中影响Cd2+分离的酸度、无机盐、卤离子种类等条件。试验表明:(NH4)2SO4存在下,无表面活性剂EV,Cd2+的萃取率只有68%,而同样条件下,加入m g级表面活性剂EV后,Cd2+与EV、I-形成三元缔合物,被均相萃取、异相分离,缔合物进入丙醇相,Cd2+被完全萃取分离。在pH=1.0时试验了Cd2+加入量为50μg/10mL和100μg/10mL时与Fe3+、Co2+、Ni2+、Zn2+、Mn2+、Zn2+、Cr3+的二元或多元离子混合液的分离试验,分离完全。
A n-propyl alcohol-water extraction system consisted of iodide and ethyl violet in the presence of （NH,）2SO, was studied, the experimental conditions of phase separation of n-propyl alcohol and water were optimized. The charged complex compound CdI4^2- forms a kind of ionassociation complex with ethyl violet,and easily extracted into the n-propyl alcohol phase. Cd^2＋ can be completely separated from Fe^3＋, Co^2＋, Ni^2＋, Mn^2＋, Zn^2＋ and Cr^3＋ by adding 2.0g （NH4）2SO4, 0. lg KI,0. 40mL of 5.0mol/L ethyl violet at pH=l. 0 or pH=4.0.
出处
《光谱实验室》
CAS
CSCD
2008年第3期331-334,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
双水相体系
乙基紫
镉
萃取分离
Aqueous Two-Phase System
Ethyl Violet
Cadmium
Extraction Separation
作者简介
张焱（1970-），女，浙江省嘉善市人，副教授，硕士，主要从事分离富集与分析测试研究。联系人，E-mail：hnzhy@hist.edu.cn
