有机试剂的溶剂萃取(液—液萃取)在分析上是一种极其有效的分离方法。特别是近年来,许多新的有机试剂的出现,更进一步促进了这项技术的发展。有机试剂的溶剂萃取,系将无机离子以中性络合物或离子缔合物的形式分配在水相和有机相中。一般要求所生成的络合物是稳定的,它对有机相的亲合性愈大,于有机相中的的分配就愈高。有机试剂的配位原子和取代基对络合物在两相中的分配具有很大的影响。如配位原子的碱性,取代基的立体效应等都直接或间接地与 Solvent extraction of organic reagents (liquid-liquid extraction) is an extremely efficient method of analysis. Especially in recent years, the emergence of many new organic reagents has further promoted the development of this technology. Solvent extraction of organic reagents involves the partitioning of inorganic ions in the form of neutral or ionic complexes between the aqueous and organic phases. The complex formed is generally required to be stable, the greater its affinity for the organic phase and the higher the distribution in the organic phase. The coordination atoms and substituents of the organic reagents have a great influence on the distribution of the complex in the two phases. Such as the basic atom of coordination atoms, the stereoscopic effect of the substituents and the like, either directly or indirectly