From: Maringanti Krishnamacharyulu (maringanti9$##$yahoo.com)
Date: Sat Feb 22 2003 - 10:15:43 EST
Hi!
1.) The soxhlet extractor is used to extract organic compounds from solids. Typically, the solids are the consistency of small particles like soil. The smaller the particles, the more surface area and the better the extraction. So, large chunks of solid are ground to smaller particles prior to extraction. The center chamber contains a porous paper thimble. Inside the thimble is the solid sample to be extracted. The round bottom flask contains a volatile organic solvent. The round bottom flask is heated not to boil the organic solvent but to create enough vapor pressure to produce a steady flow of liquid drops from the condenser at the top of the soxhlet apparatus. Once the solvent in the upper chamber rises above the relief arm, the solvent is returned to the round bottom flask and the process repeats itself. Most extractions are run for at least four hours and some extractions are run from twelve to twenty-four hours. Timing experiments must be run to determine the best analysis time for the best extraction
results.
2) Aqueous KOH (85%) helps in the hydrolysis of trimyristyl glycerol. This is a simple ester hydrolysis, that results in the formation of gycerol and myristic acid.
Good Luck
Krishna
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