Chromatography is a method used to separate and analyze mixtures of compounds. There are several different types of chromatography, including gas chromatography, liquid chromatography, and paper chromatography. Each type uses a different method to separate the components of a mixture, but they all rely on the principle of differential migration of the components through a stationary phase and a mobile phase. Chromatography is commonly used in analytical chemistry, biochemistry, and forensic science, as well as in the purification of chemicals and the production of pharmaceuticals.