Processes in solution
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Maceration: This process is leaving a solvent in contact with a drug without application of heat for a sufficient length of time in order to dissolve out its soluble matter. The insoluble residue is called ‘marc’.
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Percolation: This is extraction of soluble constituents of drugs by allowing a solvent to descend through a column of powdered drug in a cylindrical vessel. The solvent is called the menstruum vegetable tissue is called ‘marc’.
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Granulation: Coarsely crystalline salts are converted into granular powder by dissolving in water and evaporating the solution to dryness by continuous stirring.
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Lixiviation: By this a soluble salt is separated from a mixed or compound solid by dissolving in water, decanting the supernatant liquid into another vessel and evaporating it to dryness leaving the insoluble residue behind. The solution is called ‘lye’.
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Last modified: Thursday, 26 April 2012, 8:42 AM