I just read through the Heinemann chapter on chromatography but there are a few things I don't understand.
In paper chromatography the solvent supposedly moves up the paper by capillary action... how exactly does capillary action work? Also, does this mean that if I leave a piece of paper in glass of shallow water, will the entire piece of paper eventually become soggy?
In column chromatography, if you have an adsorbant solid as the stationary phase, how does the mobile phase and the sample get through it? The only way I could see it happening if adsorbant solids are also porous, so wouldn't that mean adsorbant solids and porous solids are the same thing? Finally, it says if the particles in the solid are small, then resistance to flow is increased... but shouldn't resistance decrease??
Thanks