What do you mean by reserved percolation? Enlist different steps involved in it.

What do you mean by reserved percolation? Enlist different steps involved in it.
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1 Answer

Answer :

Reserve percolation:  

• In this process a part of percolate, generally 3/4th volume of the finished preparation is reserved.(contains high solute concentration)

• Then the percolation process is continued till the drug is completely exhausted.

• The percolate is subjected to evaporation or distillation to convert in to soft extract .

• Distillation will help to recover the costly solvent.

• Hence the major portion of active constituents of the drugs are saved from deterioration

• This soft extract is dissolved in reserve portion of percolate and sufficient menstruum is added to make up the volume.

• Stages involved in reserved percolation: 

a. Imbibition,

b. Maceration,

c. Percolation,

d. Distillation or evaporation.
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