离子液体在萃取-火焰原子吸收分光光度法测定水中痕量铜的应用  

Application of ionic liquid in the determination of trace copper in water by extraction-flame atomic absorption spectrometry

作　　者：鲁鹏 程伟琴[1] 冯明 霍二福 杨帅 LU Peng;CHENG Wei-qin;FENG Ming;HUO Er-fu;YANG Shuai(Henan Chemical Industry Research Institute Co.,Ltd.,Zhengzhou 450052,China;Quality Inspection and Analytical Test Research Center,Henan Academy of Sciences,Zhengzhou 450008,China)

机构地区：[1]河南省化工研究所有限责任公司,河南郑州450052 [2]河南省科学院质量检验与分析测试研究中心,河南郑州450008

出　　处：《化学工程师》2020年第9期81-84,共4页Chemical Engineer

基　　金：河南省科学院基本科研业务费项目(200608012)。

摘　　要：建立了简单有效的离子液体萃取结合火焰原子吸收法测定痕量铜的分析方法,并用于水样中铜的测定。研究了3种不同离子液体作为萃取剂对水中Cu2+的萃取能力。主要考察了影响萃取效率的主要操作条件。结果表明,在所研究的离子液体中,离子液体作为萃取剂时,最优的实验条件为:离子液体和水相比=1∶10,离子液体浓度为60mg·mL-1,萃取温度为25℃,pH值为7~8,萃取时间20min。最佳条件下,1-甲基咪唑六氟磷酸盐离子液体的萃取率达95%。此外,对萃取后的离子液体进行了回收处理,5次循环使用后,萃取率均高于90%,重复利用率高。A simple and effective method for the determination of Trace Copper by flame atomic absorption spectrometry combined with ionic liquid extraction has been developed.The extraction ability of three different ionic liquids as extractants for Cu2+in water was studied.The main operating conditions affecting the extraction efficiency were investigated.The results showed that the optimal conditions were as follows:the ratio of ionic liquid to water was 1∶10,the concentration of ionic liquid was 60mg·mL-1,the extraction temperature was 25℃,the pH was 7~8,and the extraction time was 20in.Under the optimum conditions,the extraction rate of 1-methylimidazolium hexafluorophosphate ionic liquid was 95%.In addition,the extracted ionic liquid was recycled.After five cycles of recycling,the extraction rate was higher than 90%,and the reuse rate was high.

关 键 词：离子液体 萃取 原子吸收 铜离子 

分 类 号：X832[环境科学与工程—环境工程]