Micromeritics

This technique involves size classification followed by the determination of the weight of each fraction

• Sedimentation

• Sieving

• Microscopic

• Suspensions

dispersed system consisting of at least two immiscible liquid phases, one of which is dispersed as globules in other liquid phase.

• Sedimentation

• Emulsions

• Dispersions

• Semisolids

When oil is added to an ow emulsion or water to a w/o emulsion, separation is apparent

• dilution

• conductivity

• Dispersions

is the upward movement of the dispersed droplets relative to the continuous phase

• creaming

• inversion

• sedimentation

1. when the coherent matrix is liquid

• jelly

• xerogel

• sedimentation

1. taking up of a liquid by a gel with an increase in volume

• syneresis

• swelling

• sedimentation

1. materials which have very little attraction for the dispersion medium

• lyophobic

• swelling

• lyophilic

1. diffusion through a membrane of parchment cellophane or collodion

• ultrafiltration

• dialysis

• lyophilic

1. random movement of the colloidal particles

• brownian

• tyndall

• electrical

1. Example of this type is: Surface active agents

• association

• lyophilic

• lyophobic