1. Explain the following methods of extractions 15 MARKS Continues hot extraction, Supercritical fluid extraction, counter current extraction ΓΌ Soxhlet (hot continuous) extraction In this method; the fine ground crude drug is placed in a porous bag (Thimble), which is placed in the chamber of the soxhlet extractor. The extracting solvent in the flask is heated and its vapors condense in condenser. The condensed drops of solvent fall in the porous bag (thimble), dissolving out the desired component from a solid mixture. When the siphon tube fills to overflowing, it initiates a siphoning action into the flask. This p...
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