So as I said in my last post, we started photosynthesis in my class of Biology HL. Today we did our first practical in this topic for understanding better how pigments (Chlorophyll is an example of a pigment) actually work and how do they difference from each other.
In the practical, the first thing we did was to put a small spatula of sodium sulphate into a test tube. Then, in that same test tube we got some small pieces of spinach inside of it and mixed them with a forceps. After mixing both of them until we get kind of a liquid, we get that liquid with a painting brush. Using that painting brush, we put the liquid in a small point of a peace of paper, 1.5 cm from the edge. Then we blow in the point and put more liquid in it, for making it really concentrated. After repeating this step a couple of times, we get the paper into a test tube and fill it in with solvent B (I don't know the exact name) until the liquid is a couple of milimetres far from the point.
After all this process we leave the test tube with the paper resting for a couple of minutes. The solvent B would carry the pigments, which has been separated by the Sodium sulphate. The solvent would be able to carry some pigments further than others depending on their "weight" and we will be able to see the different pigments form the spinach leaves.
No comments:
Post a Comment