Adding to silica
Boil away the acetone. Cool, add a little (half a ml or so of fresh acetone). Add to a little silica,drop by drop, allowing the acetone to evaporate every now and then. Finally dry completely, and scrape off the watchglass.
Prepare the column
Make up a pasteur pipette as outlined. Silica deactivated with 15% water is used.
Eluting
Add napthta to the top of the pipette. Use a teat to pressurise the liquid (air pressure). A yellow band starts to move downwards. When the level of the liquid reaches the top cotton plug, stop pressurising and remove teat, without causing a vacuum. (This will suck air from the bottom of the pipette!).
Add another lot of naphtha and repeat.
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