2009.159 . Spinach Extract
I used a knife and a giant mortar and pestle to cut and grind up a pound or so of spinach. A mixture of acetone and petroleum ether extracted chlorophyll and beta carotene from the spinach. My students separated the two using a chromatography column made up of sand and finely ground silica, then they analyzed each substance using a Spec 20. This is how I spent most of my day today.