solvent fractionation

例句：

1. 1.Solvent fractionation is a method used in the separation of organic compounds.
   溶剂分馏是一种用于分离有机化合物的方法。
2. 2.In solvent fractionation, the solvent is separated from the solute by using a column.
   在溶剂分馏中，溶剂通过使用柱来与溶质分离。
3. 3. The process of solvent fractionation is crucial for the purification of pharmaceuticals.
   溶剂分馏过程对于制药的纯化至关重要。