ABSTRACT
Gas chromatography (GC) has proven to be a powerful technique for the qualitative and quantitative analysis of a wide range of materials in such diverse areas as environmental, clinical and food analysis, and petroleum and chemical production. The analysis of flavor and aroma components, the types and amounts of fatty acids and the possible presence of adulterants are some applications of GC in the food industry. Common gas chromatographic equipment consists of a carrier gas system, injector, gas chromatographic column, detector, and data processing unit. When the liquid chromatography system consists of a nonpolar mobile phase and a polar stationary phase, it is called normal-phase chromatography. Gel permeation chromatography is similar to Size exclusion chromatography, but it generally uses organic solvents for the separation of water-insoluble macromolecules. A common high-performance liquid chromatography system consists of an injection device, a column, the mobile phase delivery system, a detector, and a signal output device.
