lycopodium powder
minimum-diameter: 20 centimetres transparent (glass) preferably round.
NECESSARY MATERIAL:
| Object | Amount | Outline | |
|
oleic acid | you need only a few millilitres | yellow-coloured liquid with density lower than the water's one, it's the principal component of olive oil. |
|
hexane | 1 decilitre | transparent apolar liquid diluent of the oleic acid in the first and second solution |
|
lycopodium powder |
some cubic centimetres | discloser of oleic acid spot's borders |
|
tank | one | minimum-diameter: 20 centimetres transparent (glass) preferably round. |
|
tap water | enough to fill the tank | better if distillate |
USED INSTRUMENTS:
| Instrument | Sensitivity | Outline | |||
 |
graduated cylinder | 0.1 cubic centimetres | case for the first and the second solution, you should cover it after their preparation to avoid the vaporization of the hexane; the measurement must be conducted reading the level touched by the meniscus | ||
 |
Pasteur pipette | 0.1 cubic centimetres | transfer of a millilitre of the second solution in tank (shaping of the spot). Collect more than two millilitres of solution (and leave again only one) to have the least error (the first level, because of the nozzle, is the most unsure) | ||
 |
as high as possible |
|
|||
