##  [Partition Coefficient](/partition-coefficient) 

  ##  [Partition Coefficient](https://engineering.quantumdictionary.io/partition-coefficient-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The equilibrium ratio KD of a solute's concentration in two immiscible or distinct phases defined by KD = [solute]_phaseA / [solute]_phaseB under specified temperature, pressure and chemical conditions; KD describes preferential distribution at equilibrium and requires explicit phase definitions and conditions (for ionisable solutes, speciation matters).