Allow the solution to stand for 30 minutes, or as directed by your instructor. After this time if it appears that product has crystallized in the reservoir tube add enough solvent to dissolve the product. To aid in solution the top of the reservoir may be capped and the tube shaken. Open the stopcock and allow the contents to drain into a flask, or suck the contents through with a vacuum device. Wash the resin with one bed-volume of solvent.
Larger amounts tend to crystallize in the reservoir.
For Dibenzalacetone, use 0.25 mmol of acetone and 0.50 mmol of benzaldehyde. For Monobenzalacetone, use 0.25 mmol of benzaldehyde and 2.0 mmole of acetone. Amounts for other chalcones have not been optimized. It is recommended to start with 0.1 mmol each of the substituted benzaldehyde and substituted acetophenone. The liquids are most conveniently measured by volume using a microliter syringe.