How to prepare colloid systems

There are various ways to trick particle formations and create a colloidal system. The most important ones are the aggregation of molecules or ions and 

Typically, the colloids need, after their preparation, to be purified e.g. to remove the electrolytes that destabilize them and there are many techniques for doing that. Among the most popular ones are the dialysis, the ultrafiltration, the size exclusion chromatography (SEC) and the gel permeation chromatography (GPC). The basic separation principle is the size difference between the colloid and the other substances that need to be removed. 

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