| Popis: |
One of the outstanding techniques now being used to move back the frontiers of science is that known as "paper chromatography." It is only one in a raft of new techniques perfected in the last 10 to 20 years that is being used to separate out various organic and inorganic substances for analysis. What is fortunate about some forms of paper chromatography is that certain basic steps in the technique can be used and taught in the high school science classroom. The elementary teacher may even use the technique to show youngsters how to separate ordinary ink into its various components, by using water as the solvent. |
