> As in all chromatography there is a stationary phase and a mobile phase.
In thin layer chromatography, we can find two types, the normal whose stationary phase is polar (example: silica) and its mobile phase has less polarity, or reverse TLC, where its stationary phase is non-polar and its mobile phase is polar. In normal TLC the lower polarity of the mobile phase depends on the solvents that are used to run the samples from the seed point. This serves, since the sample must have a good resolution, that is to say separation of the components, and that they are not retained in the point o…