Generally, the preparation of emulsion can be done by two different methods
Table of Contents
In small scale or laboratory scale
stage 1: preparation of primary emulsion by dry gum method or wet gum method. In such class of primary emulsion ratios for different kinds of oil considered.
- Dry gum method
- Wet gum method
Dry gum method:
- Transfer accurately weighed quantities of gum into cleaned, dried mortar and triturate to get fine powder.
- To this add slowly measured volume of oil through the walls of the mortar and mix well.
- Then add measured volume of aqueous phase at once, at the center, start triturate vigarousely in one direction untill white creamy emulsion is formed.
Wet gum method:
- Transfer accurately weighed quantities of gum into cleaned, dried mortar and triturate to get fine powder.
- To this add slowly measured volume of aqueous phase and mix well.
- Then add slowly measured volume of oil, after complete addition of oil start triturate vigarousely in one direction untill a thick white creamy emulsion id formed.
Stage 2: Dilution of primary emulsion:
- Dissolve the additives prescribed in the preparation of vehicle before going to the dilution.
- Gradually dilute the primary emulsion with small volume of vehicle, ensuring that each addition is fully incorporated before adding the next.
- Transfer to a measure and completely risen the mortar with more vehicle.
- Make up the volume, stirr well and allow to standing for about 10 minutes or dirt from the gum to sediment.
- Decant carefully through a muslin stramer into a calibrated bollte.
- Finally shake the container vigorously.
Industrial-scale
Emulsions are prepared by using specially designed equipment viz., colloidal mill, Kenwood mixer, Hand homogenizer, silver son mixer emulsifier.
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