Furthermore, the sedimentation experiment showed the good effect of the ultrafine cefradine suspension. This would find wide applications in ultrafine cefradine injection and suspension in future.

Essentially, flocculation process is used to change particle size distribution of suspension, and units of sedimentation and filtration can only remove particles of a certain grain size range.

The quality of the suspension was characterized by measuring its sedimentation volume, size distribution, titration profile and stability.