what is column chromatography used for
Automated fraction collector and sampler for chromatographic techniques. Column chromatography in chemistry is a method used to purify individual chemical compounds from mixtures of compounds. It is often used for preparative applications on scales from micrograms up to kilograms.
Column chromatography is one of the most common methods of protein purification. Like many of the techniques on this site, it is as much an art form as a science. Proteins vary hugely in their properties, and the different types of column chromatography allow you to exploit those differences.