Chromotography

• Paper chromotography:

  1. Get a piece of paper and draw a line at the bottom of the page (baseline) with a pencil.
  2. Add sample of ink onto the baseline
  3. Find a beaker a fill it with a shallow amount of solvent (water or ethanol).
  4. Place filter paper into the solvent (place lid on top of beaker so that none of the solvent evaporates).
  5. Solvent will then seep up the paper and the different dyes will dissolve in the solvent and move up with it.
  6. Once solvent has almost reached top of the paper, we take paper out of the beaker and leave it to dry.
• Rf value = Distance travelled by the substance / distanace travelled by solvent.