摘要
在水溶液中,Sb(Ⅲ)与四丁基溴化铵和碘化钾形成不溶于水的三元缔合物[SbI4][TBAB],此三元缔合物沉淀浮于盐水相上层形成界面清晰的液-固两相。当四丁基溴化铵和碘化钾的浓度分别为4.0×10-4mol/L和6.0×10-3mol/L时,在pH1.6的克拉克-鲁布斯缓冲溶液中,Sb()的浮选率达到100%。而Ce(Ⅲ)、Zr(Ⅳ)和U(Ⅵ)离子在该体系中不被浮选,实现了Sb(Ⅲ)与这些金属离子的定量分离。对合成水样中Sb(Ⅲ)的分离和测定,结果满意。该方法具有简便、快速等特点,在微量锑的分离和富集分析中有一定的实用价值。
Sb(Ⅲ) combined with tetrabutyl ammonium bromide and KI into a ternary ion association precipitate [SbI4][TBAB] in the aqueous solutions.The precipitate was floated well on the surface of water phase to make a distinct boundary layer.Sb(Ⅲ) could be quantitively separated from Ce(Ⅲ),Zr(Ⅳ) and U (Ⅵ) by flotation,and the flotation rate of Sb(Ⅲ) achieved 100 % when the concentrations of tetrabutyl ammonium bromide and KI in Clark-Lubs buffer solution (pH=1.6) were 4.0×10-4 and 6.0×10-3mol/L,respectively.The flotation separation and determination of Sb(Ⅲ) in the sample of synthetic water were with satisfactory results.This method is easy and rapid,certain practical value is expected in separation and enrichment analysis of trace antimony.
出处
《光谱实验室》
CAS
CSCD
北大核心
2010年第3期1110-1112,共3页
Chinese Journal of Spectroscopy Laboratory
基金
河南省教育厅自然科学研究计划项目(编号:2006150023)