Aim: To seperate the different pigments in inks or dyes using paper chromatography.
Equipment: Inks from ballpoint pens, marker pens or food colouring, 250 mL beaker, strip of filter paper, scissors, adhesive tape, pencil or ice-blosck stick, chromatography solution
- Cut a strip of filter paper that is long enough to reach the bottom of your beaker and able to wrap around your pencil ice-block stick
- rule a line in pencil approximately 2 cm from the bottom of your piece of paper
- Fill your beaker with enough chromatography solution to fill your beaer to a depth of 1 cm
- place a dot of ink so repeated applications may be neccesarry.
- suspend the strip of paper from the pencil or stick. You may need to use adhesive tape to stop it from falling int othe sollution.
- wait to see what happens. It is important that you do not disturb the beaker. If the solution comes in the contact with the ink dot, the ink will run down into the solution, rather than move up the filter paper
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