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系统研究了稀土离子镧、铕和镱及偶氮胂Ⅲ在聚乙二醇 (PEG) 硫酸铵双水相体系中的分配行为 ,得出稀土元素的分配比随PEG分子量及偶氮胂Ⅲ浓度的增大而提高 .阐明了稀土元素以偶氮胂Ⅲ为络合剂时 ,分配比与络合稳定常数的正相关性 .讨论了偶氮胂Ⅲ及稀土离子与PEG的作用方式 .
The distribution of rare earth ions lanthanum, europium and ytterbium and arsenazo Ⅲ in polyethylene glycol (PEG) ammonium sulfate aqueous two-phase system was systematically investigated. The distribution ratio of rare earth elements with PEG molecular weight and the concentration of arsenazo Ⅲ The correlation between the partition ratio and the complex stability constant for arsenazo Ⅲ as complexing agent is elucidated.The action of arsenazo Ⅲ and rare earth ions on PEG is discussed.