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胺类萃取剂是一种分子量较大的胺,分子量一般在200到600。它难溶于水且易溶于某些有机溶剂。这类萃取剂的萃取机理与阴离子交换树脂的吸附相似,因此也称为液体阴离子交换剂。它具有溶剂萃取平衡速度快又有离子交换树脂分离效果高的优点。因此在分离、提纯、富集与回收等方面得到了广泛的应用。自1948年Smithf和Page介绍了这种液体离子交换技术以来,仅仅20余年的时间,胺类萃取剂在分析化学上的应用日益增多,到目前为止,可供使用的胺类萃取剂有40余种,能分离、分析的元素约50个,占周期表一半以上。发表的文献已达数百篇,已有一些较详细
Amine extractant is a higher molecular weight amine, molecular weight is generally 200-600. It is poorly soluble in water and soluble in certain organic solvents. The extraction mechanism of this type of extractant is similar to the adsorption of anion exchange resins and is therefore also referred to as liquid anion exchanger. It has the advantages of fast equilibrium of solvent extraction and high separation efficiency of ion exchange resin. So in the separation, purification, enrichment and recovery has been widely used. Since the introduction of this liquid ion exchange technology by Smithf and Page in 1948, more than 20 years have passed since the use of amine-based extractants in analytical chemistry has so far been available for more than 40 amine extractants Species that can be separated and analyzed about 50 elements, accounting for more than half of the periodic table. Published literatures have reached hundreds, some more detailed