乙醇-磷酸氢二钾-丁基罗丹明B双水相萃取光度法测定矿渣中的锌  

Extraction of zinc by ethanol-dipotassium phosphate-BRhB aqueous two-phase

作　　者：孙赛兰 何叶[1] 黎春兰[1] 祖力甫哈尔.亚科甫 李佑稷[1] 覃事栋[1] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000

出　　处：《应用化工》2016年第3期553-556,共4页Applied Chemical Industry

基　　金：国家自然科学基金(21476095);湖南省高校科技创新团队支持计划资助;吉首大学校级课题资助(15JDY005)

摘　　要：Zn（Ⅱ）与KSCN和丁基罗丹明B形成稳定的三元离子缔合物,研究了其在由乙醇和磷酸氢二钾组成的双水相体系中的最佳分配条件。实验表明,在p H 4.0的HAc-Na Ac缓冲溶液中,Zn（SCN）42-与丁基罗丹明B形成的缔合物（BRh B）2[Zn（SCN）4]的最大吸收波长为559 nm,锌（Ⅱ）在0.02-0.30μg/m L范围内符合比尔定律,其相关系数为0.999 6,表观摩尔吸光系数ε为3.4×10^5L/（mol·cm）。该方法具有处理时间短、操作过程简便优点,结果与原子吸收法结果一致。A stable ternary ion-associating complex was formed by Zn2 ＋,KSCN and butyl Rhodamine B,which was studied between ethanol and dipotassium phosphate complex in aqueous two-phase systems.The experiment showed that the ion association complex（ BRh B）2[Zn（ SCN）4]formed by Zn2 ＋,KSCN and butyl Rhodamine B at p H 4. 0 of HAc-Na Ac buffer solution,and the maximum absorption wavelength was located at 559 nm. Under this condition,Beer＇s law was obeyed for the amount of Zn2 ＋at the range of 0. 02 - 0. 3 μg / m L,and the linear correlation coefficient was 0. 999 6,the apparent molar absorptivity（ ε） was 3. 4 × 10^5 L /（ mol·cm）,respectively. The method have some advantages such as short dispose time and easily operating,which is a environmentally-friendly method. The results were in good agreement with values measured by atomic absorption spectrometry.

关 键 词：双水相萃取 乙醇 离子缔合法 丁基罗丹明B 

分 类 号：TQ420.66[化学工程] O433.4[机械工程—光学工程]