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Questions and Answers
What is a disperse system?
What is a disperse system?
- A system where one substance is dissolved in a second substance
- A system where two substances are completely mixed together
- A system where one substance is distributed in discrete units throughout a second substance (correct)
- A system where two substances are separated by a barrier
What can the phases in a disperse system exist as?
What can the phases in a disperse system exist as?
- Solid only
- Solid, liquid, or gaseous (correct)
- Liquid only
- Gaseous only
What is the internal phase in a pharmaceutical suspension?
What is the internal phase in a pharmaceutical suspension?
- Dissolved solid particles
- Gaseous particles
- Insoluble solid particles (correct)
- Soluble liquid particles
What are the reasons for the formulation of a pharmaceutical suspension?
What are the reasons for the formulation of a pharmaceutical suspension?
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What is the range of size for insoluble solid particles in a pharmaceutical suspension?
What is the range of size for insoluble solid particles in a pharmaceutical suspension?
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Study Notes
Disperse Systems
- A disperse system is a mixture in which one substance is dispersed in another substance, often in different phases.
Phases in Disperse Systems
- The phases in a disperse system can exist as: • Solid-in-liquid (suspension) • Liquid-in-liquid (emulsion) • Gas-in-liquid (foam) • Solid-in-gas (aerosol)
Pharmaceutical Suspensions
- In a pharmaceutical suspension, the internal phase is the insoluble solid particles of the active pharmaceutical ingredient (API).
Reasons for Formulation of Pharmaceutical Suspensions
- Pharmaceutical suspensions are formulated: • To improve bioavailability of insoluble drugs • To mask unpleasant taste or odor of the API • To provide a more efficient method of administration • To reduce the frequency of dosing
Particle Size in Pharmaceutical Suspensions
- The range of size for insoluble solid particles in a pharmaceutical suspension is typically between 0.1 μm and 100 μm.
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Description
Test your knowledge of disperse systems with this quiz. Explore the characteristics of dispersed and continuous phases, as well as the different states in which they can exist. Learn about suspensions and their composition.
