Chromatography-Another way to find whether a liquid is a pure substance or mixture of substances.
Allows you to separate different solutes
The solvent 'sticks' to the particles of the solute in the mixture & carries them along as it moves.
Particles of some solutes 'stick' more strongly to the paper than the others therefore they're not carried as far, before they are dropped.
Chromatography can be used to analyse foods to see what's in them.
Chromatography can be used to detect small amounts of substances in complex mixtures.