An emulsion is an unstable biphasic system consisting of two immiscible liquids, with one liquid dispersed as small particles in the other liquid. There are two main types of emulsions: oil-in-water (o/w) and water-in-oil (w/o). Emulsions are stabilized using emulsifying agents with both hydrophilic and lipophilic parts, such as acacia, tragacanth, sodium alginate, agar, and pectin. Surfactants are compounds that lower the surface tension between liquids and solids, and are used as emulsifiers. Emulsifier equipment includes mechanical stirrers, propeller mixers, homogenizers, and

1. Prepared By
Shivanee Vyas
M Pharmacy
Lakshmi Narain College of Pharmcy, Indore

2. Definition.
Types of emulsion.
Preparation.
Emulsifying agent.
Surfactant.
Emulsifier /Equipment.
Uses.
Contents.

3.  Definition. :
 An emulsion is defined as, it is unstable
biphasic system ,consisting of two
immiscible liquids, one of dispersed phase
an other is liquid phase.

4. There are two type of
emulsion..
1- Oil in water. (o/w).
2- Water in oil. (w/o).
Types of emulsion. :

5. An emulsion in which oil is the dispersed phase
is oil , and an aqueous solution is the continuous
phase.
Example Milk, vanishing cream is an example
of (o/w) emulsion.
2- Water in oil. (W/O).
An emulsion in which dispersed phase is water,
and continuous phase is oil.
Example butter is the example.
1- Oil in water. (o/w)

6. Emulsion are stabilized by adding an emulsifier
and emulsifying agent. These agent have both
hydrophilic and lipophilic part in their chemical
structure.
Emulsifying agent are –
1-Acacia.
2-Tragacanth.
3-Sodium alginate.
4-Agar.
5-Pectin.
 Emulsifying agent. :

7. Surfactants are compounds that lower the
surface tension (or interfacial tension)
between two liquids or between a liquid and
a solid. Surfactants may act as detergents,
wetting agents, emulsifiers, foaming agents,
and dispersants……
Example- Soap , detergent.
Types of surfactant –
1- Anionic.
2- Cationic.
3- Non- ionic.
Surfactant. :

8.  Types :
1-Anionic – Inaqueous solution, these ionize into a large anion,
responsible for their emulsifying ability, and asmall cation.
2-Cationic – In aqueous solution , these ionize into a large
cation, responsible for their emulsifying ability, and a small
anion.
3- Non-ionic – These do not ionize in aqueous solution.

9.  Emulsifier Equipment. :
It is the machinery system ,by which
emulsion is prepared.

10.  Mechanical Stirer..

11.  Propeller mixer. :

12.  Homogeniser. :

13. Colloid milis. :

14. It is are of two type :
1- Dry gum method.
2- Wet gum method.
 Preparation of emulsion.:

15. Acacia is placed into mortar Acacia is placed in mortar.
Which is already filled with oil
Add 25 ml. water & triturate it,
Lump are removed by trituration. To form mucilage.
After ten sec. add liquid paraffin Continuous trituration add
liquid paraffin.
Add 25ml. Water and triturate it
Than add oil in this mucilage
Until Emulsion is formed. Mixture.
Triturate it, and Emulsion is
formed.
1-Drygum method. 2-Wetgum method.

16.  Uses of emulsion.: