science

        

filtering
        

        the action or process of filtering something.

      "small particles are difficult to remove without filtration"

distillntion 

1. the action of purifying a liquid by a process of heating and cooling.

   "the petroleum distillation process

   synonyms:

   distilling, purification, refining, filtering, filtration, treatment, processing; More

   
   
2.       the extraction of the essential meaning or most important aspects of something.
3. "this book represents the distillation of years of experience in the private sector" 

chromaroghraphy

        a technique for the separation of a mixture by passing it in solution or suspension                     through a medium in which the components move at different rates.

centrifuge

        a machine with a rapidly rotating container that applies centrifugal force to its contents,            typically to separate fluids of different densities (e.g. cream from milk) or liquids from solids.