Lecture 16 - Medical Products: Suspensions Flashcards
1
Q
Which is optically clear? solution or suspensions?
A
solutions
2
Q
What is a suspension?
A
In suspension solid particles are ‘suspended’ in a liquid/continuous phase.
3
Q
Colloidal suspension
A
up to one micron
4
Q
Coarse dispersion
A
over 1 micron
5
Q
what phase should suspension be in?
A
secondary minimum
6
Q
Electrical double layer for single particle
A
Becomes charged due to ionization of water. OH- ion collects on particle’s surface. Around particle positive charge acts as a shield, overall remaining neutral.
7
Q
What happens at primary minimum?
A
coagulation will occur
8
Q
A
