Practice question

Partition chromatography involves two immiscible liquid phases, one immobilized as stationary and another moving as mobile. Separation arises from differential solubility or partition coefficient of solutes between these liquids. Molecules more soluble in stationary liquid are retained longer, while those favoring mobile phase migrate quickly. Classic example is paper chromatography where water held in cellulose pores acts as stationary phase. This contrasts with adsorption based on surface binding, charge-based ion exchange, or biospecific affinity. Partition principle underpins quantitative distribution law and is essential for separating closely related hydrophilic metabolites in biochemical analysis.