【摘要】 研究了在聚乙二醇 2 0 0 0 (PEG) 硫酸铵 偶氮胂Ⅰ体系中Th(Ⅳ ) ,U(Ⅵ ) ,La(Ⅲ ) ,V(Ⅴ )的萃取行为。结果表明 ,在pH 1.0～ 5 .0溶液中 ,Th(Ⅳ )可被PEG相几乎完全萃取 ,Mo(Ⅵ )部分被萃取 ,而La(Ⅲ ) ,U(Ⅵ ) ,V(Ⅴ )则不被萃取 ,从而实现了Th(Ⅳ )与U(Ⅵ ) ,La(Ⅲ ) ,V(Ⅴ )混合离子间的定量分离。通过吸收光谱和络合比的测定 ,研究了PEG相中试剂及络合物的存在形态。更多还原

【Abstract】 In polyethylene glycol 2000(PEG)(NH 4) 2SO 4 Arsenazo Ⅰ system the extraction separation behaviour of the complexes of Th(Ⅳ), U(Ⅵ), La(Ⅲ), Mo(Ⅵ) and V(Ⅴ) was investigated The results indicate that the complexes of Th(Ⅳ) are almost completely extracted by the PEG phase, and Mo(Ⅵ) is partly extracted,while La(Ⅲ), U(Ⅵ) and V(Ⅴ) are not extracted from the aqueous solution of pH=1 0～5 0. So Th(Ⅳ) is quantitatively separated from the mixed solution U(Ⅵ), La(Ⅲ) and V(Ⅴ) ions. Existing form of reagent and complex in PEG phase was studied by determination of absorption spectra and molar ratio.更多还原