Dialysis is a process similar to osmosis, involving the movement of molecules through a semipermeable membrane. In dialysis a special type of semipermeable membrane called a dialyzing membrane allows small solute particles as well as water molecules to pass through. However, larger colloidal particles cannot pass through the dialyzing membrane. The process of dialysis can be used to separate smaller molecules from larger colloidal particles. NaC1 Solution albumin Solution starch solution