Centrifuge Extractor

It may be defined as the Place the bowl containing the sample and solvent in the machine. Dry and weight the filter ring and fit it around the edge of the bowl. Clamp the cover over the bowl tightly in place and place the beaker under the drain to collect the extract Start the machine revolving slowly, gradually increasing speed to a maximum of 3600 rpm or until solvent ceases to flow from the drain. Allow the machine to stop, add 200 ml of benzene, and repeat the above procedure. Use sufficient 200 ml solvent and repeat the above procedure. Use sufficient 200 ml solvent additions (not less than three) so that the extract is clear and not darker than and light straw color when a portion is viewed in a separate container.