Chromatography Paper & Thin layer

• Chromatography is a technique that uses a stationary phase and a mobile phase to separate a mixture
• The mobile phase flows through the stationary phase carrying out the components in the mixture with it
• How does chromatography works?

  It works as the mixtures are separated because each substance in the mixture will travel at different rate through the stationary base , depending on their relative attractions to the phase ( how soluble each mixture is)
• Stationary phase in Chromatography is the..

  • Chromatography paper ( putting ink one the paper
• Mobile phase is the…

  • Liquid solvent (As the water gets absorb by the paper the colours separate)
• To get the Rf value =Distance travelled by substance

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  Distance travelled by solvent
• To get the Rf value you get the distance travelled by the solvent and substance from the origin ( the pencil line)
• Materials you need are ...

  • Beaker
  • Pin
  • Pencil
  • Chromatography paper
  • Ink spot
• Thin layer chromatography

  • The stationary phase is a thin layer of un reactive substance supported on a flat
  • The Mobil phase is a solvent
  • Some advantages are : Mobil phase moves quicker and evenly though the stationary phase and chromatograms show greater separation of the components in the mixture