Emulsions

Question 1

Define an emulsion

Answer 1

is a liquid preparation containing two immiscible liquids, one of which is dispersed as globules (dispersed phase = internal phase) in the other liquid (continuous phase = external phase).

Question 2

General Types of Pharmaceutical Emulsions

Answer 2

Lotions
Liniments
Creams
Ointments
Vitamin drops

Question 3

How to determine an emulsion type

Answer 3

By order of addition-slowly add oil into water (o/w emulsion )
By type of emulsifier ( oil soluble or water soluble)
Phase that the emulsifiers is soluble will most probably be continuos phase

Question 4

Tests for Identification of Emulsion Types

Answer 4

1. Dilution Test
2. Dye Solubility Test
3. Conductivity Test

Question 5

What dilution test?

Answer 5

—Based on the solubility of external phase of emulsion
—- o/w emulsion can be diluted with water. —
- w/o emulsion can be diluted with oil.

Question 6

What is conductivity test?

Answer 6

Water is good conductor of electricity whereas oil is non-conductor. Therefore, if the continuous phase is water, the bulb will glow.

Question 7

What is Dye-Solubility Test?

Answer 7

— - Water-soluble dye will dissolve in the aqueous phase. —
- Oil-soluble dye will dissolve in the oil phase.

Question 8

What is emulsifying agents

Answer 8

substances added to an emulsion to prevent the coalescence of the globules of the dispersed phase.

Question 9

can be given parenterally in form of oil-
in water emulsion.

Answer 9

Oil-soluble

Question 10

Separation of the internal phase from the external phase is called

Answer 10

BREAKING

Question 11

Emulsions for parenteral intravenous (IV) administration are

Answer 11

oil/water (o/w) type for easy mixing with the blood.