Processes of separation

PROCESS OF SEPARATION

  • Decantation: This is a method in which the supernatant is poured off carefully leaving the sediment at the bottom.
  • Elutriation: This is used to separate fine insoluble powders in a suspension and then decanting.
  • Straining or colation: In this the coarse solid particles are separated from liquids by pouring through a cloth.
  • Dialysis: Separating crystalloids from colloids by passing though an animal membrane.
  • Sifting: By this method fine particles are separated from coarse one by means of a sieve.
  • Filtration: By this solid particles are separated from liquids by passing it through a finely porous material such as filter paper.
  • Crystallisation: By this form drugs are converted into crystals.
  • Decoloration or Decolourisation: This is usually done by treating with activated charcoal or other adsorbent.
  • Clarification: This removes suspended solids by agitating the mixture by insoluble powder or adding egg albumin and boiling or by centrifugation.
Last modified: Thursday, 26 April 2012, 8:41 AM