The choice of the extractant is the key of the extraction operation,so the choice of the extractant is the first thing when solvent extraction method is used.

• 溶剂萃取法是卤水提硼较好的方法之一,萃取剂的选择是萃取操作的关键,因此采用萃取操作时,首要的问题是萃取剂的选择。