摘要
研究发现硫酸铵能使乙醇的水溶液分成两相,在分相过程中,Ir(与碘化钾生成的IrI62-与质子化乙醇(C2H5OH2+)形成的缔合物[IrI62-][C2H5OH2+]2能被乙醇相完全萃取。当乙醇、碘化钾和硫酸铵的浓度分别为30%(V/V)、3.5×10-3mol/L、0.3 g/mL,pH 3时,Ir(的萃取率达到100%,而Fe3+、Al3+、Cr3+、Pb2+、Co2+、Ni2+、Zn2+、Mn2+和Ga3+基本不被萃取,实现了Ir(与上述金属离子的分离。该方法对合成水样中的Ir(进行了分离和测定,在微量铱的分离和富集分析中有一定的实用价值。
In this study, it was found that the ethanol-water solution could be well divided into two phases due to the action of ammonium sulphate. The associated complex [IrI6^2-][C2H5OH2^＋]2 formed by C2H5OH^2＋ and IrI6^2- （combined from Ir（Ⅳ） and potassium iodide）could be completely extracted during this process. Ir（Ⅳ） could be separated from Fe^3＋ , Al^3＋, Cr^3＋, Pb^2＋, Co^2＋, Ni^2＋ , Zn^2＋ , Mn^2＋ and Ga^3＋ by extraction, and the extraction yield of Ir（Ⅳ） achieved 100 % when the concentration of ethanol, potassium iodide and ammonium sulphate in solution （pH 3） were 30%（V/V）, 3.5× 10.3 mol/L and 0. 3 g/mL, respectively. This method was applied to the extraction separation and determination of iridium in the synthetic water sample. This method was practical to the separation and enrichment of trace iridium
出处
《冶金分析》
CAS
CSCD
北大核心
2009年第10期66-69,共4页
Metallurgical Analysis
基金
河南省教育厅自然科学研究计划项目(2006150023)
关键词
铱
乙醇
碘化钾
硫酸铵
萃取分离
iridium
ethanol
potassium iodide
ammonium sulphate
separation extraction
