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离子交换和溶剂萃取法是两种最常用的化学分离法,尤其在分析化学中经常用作富集和分离手段。这两种方法各有优、缺点。离子交换法的优点是浓缩系数高,操作时劳动强度低、安全(尤其是分离放射性物质),树脂再生后可重复使用等;缺点是选择性较差,淋洗时“尾巴。比较长。溶剂萃取法的优点是选择性好,分离速度快;缺点是浓缩系数小,劳动强度大,在分离放射性物质时容易发生沾污,且会产生有机相废液。长期来,人们就在寻找新的方法以便能将萃取法和离子交换法的优点结合起来。
Ion exchange and solvent extraction are the two most commonly used methods of chemical separation, and are often used as enrichment and separation tools, especially in analytical chemistry. Each of these two methods has advantages and disadvantages. Ion exchange method has the advantages of high concentration coefficient, low labor intensity during operation, safety (especially the separation of radioactive material), reusable resin after regeneration, etc .; disadvantage is less selective, rinse tail “longer.” Solvent The advantages of the extraction method is the good selectivity, fast separation; the disadvantage is that the concentration coefficient is small, labor-intensive, prone to contamination in the separation of radioactive material, and will produce organic waste. For a long time, people are looking for new Method to combine the advantages of extraction and ion exchange methods.