FA13+CHEM+225+Exp8+Column+Chromatography_001

Three small beakers or erlenmeyer flasks watchglass

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Unformatted text preview: column” throughout the rest of the experiment). Three small beakers or Erlenmeyer flasks, watchglass, and Pasteur pipet. The glassware must be dry prior to use; do not rinse the column with water prior to use since it will be too difficult to properly dry. CAUTION/NOTE: The tip of the column can be easily removed. Do not hold the column only by the tip or it will dislocate, fall, and break. On the positive side, if the flow rate is too slow during the experiment due to solid formation in the tip, the stopcock can be closed and the tip may be removed for cleaning with a few milliliters of dichloromethane (CH2Cl2). Column set-up. Using the ring-stand, clamp the glass column in a vertical position with its stopcock closed. If the clamp is excessively tight, the column may crack. If the column is too loose, the column may slip through the clamp and break by hitting the surface of the hood. 1 v.002 Using a glass rod, insert a small piece of cotton (a “plug”) loosely into the bottom of the column. Cover the cotto...
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This document was uploaded on 01/16/2014.

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